| TA |
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initialism
- transportation, Transportation authority, Authority
- teaching, Teaching assistant, Assistant
- territorial, Territorial army, Army
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| tall oil |
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noun
- A dark yellow resinous acidic oil obtained as a byproduct during the pulping of pine; it is used in the manufacture of soaps and lubricants
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| tannic |
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adjective
- Pertaining to, containing, or obtained from tannin.
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| tannic acid |
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noun - (chemistry) any of various complex phenols extracted from the bark or galls of trees; used in tanning
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| tannin |
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noun - (chemistry) tannic acid or any of its derivatives
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| tantalate |
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noun - (chemistry) any salt of tantalic acid
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| tantalic |
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adjective - (chemistry) Containing pentavalent tantalum.
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| tantalic acid |
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noun - (chemistry) the hydrated form of tantalum oxide, Ta2O5
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| tantalous |
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adjective - (chemistry) Containing tantalum in a higher proportion than tantalic compounds.
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| tantalum |
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noun
- A metallic chemical element (symbol Ta) with an atomic number of 73.
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| tar |
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noun (wikipedia, tar, tar (viscous substance))
- (uncountable) A black, oily, sticky, viscous substance, consisting mainly of hydrocarbons derived from organic materials such as wood, peat, or coal.
- coal tar, Coal tar.
- (uncountable) A solid residual byproduct of tobacco smoke.
- (context, slang, dated) A sailor, because of their tarpaulin clothes. Also Jack Tar.
- (computing) a program for archiving files, common on Unix
- (computing) a file produced by such a program
verb
- To coat with tar.
- (computing) To create a tar archive.
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| tare |
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noun
- (rare) A vetch, or the seed of a vetch.
- (rare) A damaging weed growing in fields of grain (with reference to Matthew 13:25: "But while men slept, his enemy came and sowed tares among the wheat, and went his way." The King James Version (Authorized))
- 1985, I saw as I thought an uncle and guardian who has led a sober, industrious and Christian life and finds himself obliged to look on the tares of folly in his own close kin. " John Fowles, A Maggot
verb (tar, ing)
- To allow for the tare; to set a counter or meter to a valid zero (usually weight) value, discounting the weight of the empty container.
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| tartar |
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noun
- A red compound deposited during wine making; mostly potassium hydrogen tartrate - a source of cream of tartar.
- A hard yellow deposit on the teeth.
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| tartaric acid |
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noun
- a white crystalline acid that occurs naturally in many plants, and in wine; it is used as the salts cream of tartar and Rochelle salt
- (chemistry) a dihydroxy-dicarboxylic acid, 2,3 dihydroxy-succinic acid
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| tartrate |
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noun - (chemistry) any salt or ester of tartaric acid
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| tartrazine |
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noun - (chemistry) a lemon-yellow azo dye used as a food colouring
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| taurine |
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noun
- (biochemistry) An amino-sulfonic acid, NH2CH2CH2SO3H, that has regulatory functions in mammals.
adjective
- Pertaining to a bull; bull-like.
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| taurocholic |
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adjective
- Pertaining to taurine and bile; only used in designation of taurocholic acid.
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| tautomerism |
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noun - (chemistry) A form of isomerism in which a dynamic equilibrium between two isomers exists, such as that between an enol and a ketone.
category:Organic chemistry
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| TB |
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initialism
- tuberculosis
- (baseball) The statistic reporting "Total Bases". A single is counted as one, a double as two, a triple as three, and a home run as four bases.
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| TC |
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initialism - (internet) Topic Closed. Used in Internet forums to announce that a topic thread is locked, indicating that no further replies are allowed in that topic thread.
- (electronics) Time Counter.
- (electronics) thermocouple
- (internet messaging) Acronym for Take Care.
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| TCA |
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initialism - tricyclic antidepressant
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| tear gas |
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noun
- Any lachrymatory non-lethal chemical compound that causes the eyes to sting and water and/or irritates the respiratory system, mostly used for controlling crowds during riots or as self-defence.
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| technetium |
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noun
- a metallic chemical element (symbol Tc) with an atomic number of 43.
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| Teflon |
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proper noun
- A registered trademark of DuPont? for its multiple film, resin, coatings, fabric and surface protectors made with PTFE (polytetrafluoroethylene)or fluoropolymer and surfactants not made with PTFE only authorized under license by DuPont? to its customers and licensees.
adjective
- (of a politician) having an undamaged reputation.
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| tel |
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abbreviation - telephone
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| tellurate |
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noun - (chemistry) any salt of telluric acid
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| telluric |
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adjective
- Pertaining to the Earth.
- (chemistry) Containing tellurium in a lower valency than in tellurous compounds.
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| telluric acid |
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noun - (chemistry) the hydrated form of tellurium oxide, H6TeO?6, with some use as a reagent
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| telluride |
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noun (wikipedia, Telluride (chemistry))
- (chemistry) (countable) A compound of a metal with tellurium; metal salts of tellurane
- (chemistry) (countable) Any organic compound of general formula R2Te (R not = H), the tellurium analogues of ethers
- (mineralogy) (uncountable) Another name for sylvanite.
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| tellurium |
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noun
- (uncountable) The chemical element with atomic number 52. Symbol: Te.
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| tellurous |
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adjective
- (chemistry) Containing tellurium in a higher valency than in telluric compounds.
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| terpene |
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noun - (organic chemistry) A very large class of naturally occurring and synthetic organic compounds formally derived from the hydrocarbon isoprene; they include many volatile compounds used in perfume and food flavours, turpentine, the steroids, the carotene pigments and rubber.
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| terpolymer |
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noun
- a copolymer derived from three species of monomer
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| tervalent |
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adjective - (chemistry) trivalent
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| Test |
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noun - (cricket) (sometimes test) a Test match
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| test paper |
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noun
- a paper submitted to an examination by a student
- a small piece of paper impregnated with a chemical indicator for making qualitative tests
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| tetrabasic |
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adjective - (chemistry) (of an acid) containing four replaceable hydrogen atoms
- (chemistry) (of a salt) having four atoms of a univalent metal
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| tetracene |
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noun - (organic compound) A polycyclic aromatic hydrocarbon; the acene containg four fused rings.
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| tetrachloride |
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noun - (chemistry) any chloride containing four chlorine atoms in each molecule
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| tetrad |
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noun
- A group of four things.
- Chemistry. A tetravalent atom or radical.
- Biology. Two pairs of sister chromatids (a dyad pair) aligned in a certain way and often on the equatorial plane during the meiosis process.
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| tetrafluoride |
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noun - (chemistry) any chloride containing four fluorine atoms in each molecule
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| tetrahydrofuran |
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noun - (chemistry) a heterocyclic ether having a five-membered ring with four carbon atoms and one carbon; it is a colourless liquid with an ether-like smell, and is used as a polar solvent
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| tetravalent |
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adjective - (chemistry) having a valence of 4
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| tetroxide |
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noun - (chemistry) any oxide containing four oxygen atoms in each molecule
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| Th |
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abbreviation
- Thursday.
- (biblical) Book of Thessalonians.
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| thallic |
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adjective
- Pertaining to or containing the element thallium, especially with valence 3.
- Pertaining to a thallus.
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| thallium |
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noun
- a metallic chemical element (symbol Tl) with atomic number 81.
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| thebaine |
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noun - (poison) A poisonous alkaloid, paramorphine, obtained from opium; not used in medicine.
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| thermochemistry |
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noun - (context, chemistry, physics) The study of the thermodynamics of chemical reactions.
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| thermoplastic |
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noun
- a material with this property; a thermoplastic resin
adjective
- softening when heated and hardening when cooled
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| thermosetting |
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adjective
- becoming permanently hard or solidifying when heated; used especially of synthetic plastics such as Bakelite
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| thiazole |
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noun - (organic compound) Any of a class of unsaturated heterocyclic compounds containing a ring of three carbon atoms, a sulphur and an nitrogen atom; especially the simplest one, C3H3SN.
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| thickener |
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noun
- any substance added to something in order to thicken it; a thickening agent
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| thin-layer chromatography |
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noun (abbreviation TLC)
- (analytical chemistry) A form of chromatography in which the solid phase is silica gel or a similar inert material supported on a glass plate.
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| thinner |
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noun
- A liquid substance used to thin the consistency of another liquid.
- ''Turpentine or mineral spirits can be used as a for oil based paints.
adjective
- (comparative of, thin, lang=English, POS=adjective)
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| thioaldehyde |
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noun - (chemistry) any analogue of an aldehyde, or general formula RC(=S)H, in which the oxygen has been replaced by sulfur
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| thiocyanate |
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noun - (chemistry) any salt or ester of thiocyanic acid; or the -SCN radical or the SCN-1 anion
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| thiocyanic acid |
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noun - (chemistry) a poisonous unstable liquid, HSCN; its salts and esters, the thiocyanates have a variety of uses
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| thiol |
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noun - (chemistry) a univalent organic radical (-SH) containing a sulphur and a hydrogen atom; a compound containing such a radical
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| thiophene |
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noun thoophene
- (chemistry) Any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an sulphur atom; especially the simplest one, C4H4S.
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| thiophosphate |
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noun - (chemistry) Any compound formally derived from a phosphate by replacing one or more oxygen atoms with sulfur
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| thiosulfate |
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noun - (chemistry) any salt or ester of thiosulfuric acid
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| thiosulfuric acid |
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noun
- (inorganic compound) An unstable acid, H2S2O3, formally derived from sulfuric acid by the substitution of a sulfur atom for an oxygen one; it is known only in solution or as its salts and esters, the thiosulfates.
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| thixotropy |
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noun - (Chemistry, Medicine) The property of some gels to become a fluid when agitated and return to being solid or semi-solid when allowed to stand.
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| thorium |
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noun
- a chemical element (symbol Th) with atomic number 90.
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| TI |
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initialism
- (italbrac, company) Texas instrument, Instruments.
- (electronics) time, Time interval, Interval.
- (italbrac, organization) w:Transparency International, Transparency International.
- (italbrac, company) w:Treasure Island Hotel and Casino, Treasure Island Hotel and Casino.
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| tin |
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noun
- (context, uncountable, element) A malleable, ductile, metallic element, resistant to corrosion, with atomic number 50 and symbol Sn.
- (context, British, countable) An airtight container, made of tin or another metal, used to preserve food.
- (countable) A metal pan used for baking, roasting, etc.
- muffin
- roasting
verb (tin, n, ing)
- (transitive) To place into a tin in order to preserve.
- (transitive) To cover with tin.
- (transitive) To coat with solder in preparation for soldering.
adjective
- Made of tin.
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| titanate |
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noun - (chemistry) any salt (or ester) of titanic acid
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| Titanic |
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proper noun the Titanic
(wikipedia, RMS Titanic)
- A cruise liner that sink, sank on its maiden voyage on April 14, 1912; now a cautionary tale about overconfidence.
adjective - Of, or relating to the Titans, a race in ancient mythology.
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| titanic acid |
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noun - (chemistry) a weak acid, either of two hydrated forms of titanium dioxide, H2TiO?3 or H4TiO?4; used as a mordant
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| titanium |
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noun (Symbol: Ti)
- a chemical element, atomic number 22; it is a strong, corrosion-resistant transition metal, used to make light alloys for aircraft etc .
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| titanium dioxide |
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noun - (chemistry) a brilliant white powder, TiO?2, used as a pigment, and in sunblock, toothpaste and cosmetics
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| titrant |
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noun
- (analytical chemistry) The reagent of known concentration and volume used in titrations.
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| titrate |
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verb (titrat, es)
- (context, transitive, analytical chemistry) To ascertain the amount of a constituent in a solution (or other mixture) by measuring the volume of a known concentration (the "standard solution") needed to complete a reaction.
- 2005: He was obsessed with making LSD even purer than Sandoz, producing it first in powder form in gelatin capsules as well as light-blue liquid ("Mother's Milk") that was easily recognizable when titrated onto sugar cubes. " Martin Torgoff, Can't Find My Way Home (Simon & Schuster 2005, p. 122)
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| TN |
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abbreviation
- Tennessee, a state of the United States of America.
initialism
- telephone number, Telephone number.
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| TNT |
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initialism
- Trinitrotoluene, an explosive substance used in blasting.
- (informal) dynamite, Dynamite, an explosive.
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| transactinide |
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noun - (chemistry),(physics) any of the artificially produced elements having an atomic number greater than 103
adjective - (chemistry),(physics) lying beyond actinium in the periodic table; having an atomic number greater than 103
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| tribromide |
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noun - (chemistry) any bromide containing three bromine atoms in each molecule
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| trimolecular |
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adjective - (chemistry) (of a reaction) involving three molecules
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| trinitrotoluene |
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noun
- A highly explosive yellow crystaline substance (CH3C6H2(NO2)3)
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| trioxide |
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noun
- (chemistry) any oxide containing three oxygen atoms in each molecule
- (chemistry) any organic compound of general formula R-OOO-R', derived from trioxidane
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| triphosphate |
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noun - (chemistry) any salt or ester containing three phosphate groups
- (chemistry) any salt or ester of triphosphoric acid
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| triphosphoric acid |
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noun - (chemistry) a condensation product of phosphoric acid, H5P3O10, known from its salts and esters
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| triple bond |
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noun
- (chemistry) A covalent bond in which three electron pairs (instead of the usual one) are shared between two atoms; most common between carbon atoms and carbon or nitrogen atoms, but a few other forms are known. Symbolized in formulae as �.
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| trisodium |
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noun - (chemistry) (in combination) three atoms of sodium in a compound
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| tritium |
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noun
- (isotope) A radioactive isotope of the element hydrogen, (symbol T or (nuclide, 3, 1, H)), having one proton and two neutrons
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| triturate |
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verb (triturates, triturating, triturated)
- to grind to a fine powder, to pulverize
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| trituration |
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noun
- the act of triturating; grinding to a fine powder
- something triturated, especially dental amalgam
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| trivalent |
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adjective - (chemistry) having a valence of 3
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| trivial |
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adjective
- Of little significance or value.
- common, Common, ordinary.
- Concerned with or involving trivia.
- (biology) Relating to or designating the name of a species; specific as opposed to generic.
- (mathematics) Of, relating to, or being the simplest possible case.
- (mathematics) self-evident, Self-evident.
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| tropine |
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noun
- a poisonous alkaloid obtained by the hydrolysis of atropine
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| tsp |
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abbreviation
- teaspoon
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| tungstate |
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noun - (chemistry) any salt of tungstic acid
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| tungsten |
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noun
- a metallic chemical element (symbol W) with an atomic number of 74. The symbol is derived from the Latin word wolframium.
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| tungstic |
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adjective - (chemistry) of or relating to tungsten
- (chemistry) containing hexavalent tungsten
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| tungstic acid |
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noun - (chemistry) the solid hydrated form of tungsten oxide, H2WO4; used in textiles, and in yellow glazes
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| turpentine |
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noun (or turps)
- a volatile essential oil obtained from the wood of pine trees by steam distillation; it is a complex mixture of monoterpenes; it is used as a solvent and paint thinner
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