| LA |
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abbreviation
- Louisiana, a state of the United States of America.
initialism
- Los Angeles (US city)
- lead arsenate, a pesticide introduced in the US in 1892, largely replaced by DDT in the late 1940's, and ultimately banned in 1988.
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| label |
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noun
- A small ticket or sign giving information about something to which it is attached or intended to be attached.
- A name given to something or someone to categorise them as part of a particular social group.
- A company that sells records.
verb (labels, 2=labelling i, UK) or labeling (i, US), 3=labelled (i, UK) or labeled (i, US)
- (transitive) To put a label (a ticket or sign) on (something).
- (transitive) To give a label to (someone or something) in order to categorise that person or thing.
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| labile |
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adjective
- Liable to slip, err, fall, or apostatize.
- Apt or likely to change.
- (context, chemistry, of a compound or bond) Kinetically unstable; rapidly cleaved (and possibly reformed).
- Certain drugs can be conjugated to polymer molecules with a linkage that is at low pH to effect controlled release in a cellular endosome.
- Water ligands typically bind metals in a fashion and are rapidly interchanged in aqueous solution.
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| lactam |
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noun
- (organic chemistry) Any of a class of cyclic amides, that are the nitrogen analogs of lactones, formed by heating amino acids; the tautomeric enol forms are known as lactims.
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| lactate |
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noun - (chemistry) Any salt or ester of lactic acid
verb (lactat, ing)
- (intransitive) To secrete or produce milk
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| lactone |
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noun
- (organic chemistry) A cyclic intramolecular ester derived from a hydroxy acid.
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| lampblack |
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noun
- An amorphous form of carbon made from incompletely burned organic matter; used to make pigments and inks.
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| lanthanide |
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noun
- (chemistry) any of the 14 rare earth elements from cerium (or from lanthanum) to lutetium in the periodic table; because their outermost orbitals are empty, they have very similar chemistry; below them are the actinides
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| lanthanum |
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noun
- A metallic chemical element (symbol La) with an atomic number of 57.
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| latex |
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noun (latices, pl2=latexes)
- The milky sap of several trees that coagulates on exposure to air; used to make rubber.
- An emulsion of rubber in water, used in adhesives and the like.
adjective
- Made from latex.
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| laurate |
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noun
- (chemistry) any salt or ester of lauric acid
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| lauric |
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adjective
- Pertaining to, or derived from, the European bay or laurel (Laurus nobilis)
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| lauric acid |
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noun - (chemistry) a fatty acid, CH3(CH2)10COOH, occurring in coconut, palm and laurel oil; mostly used in making cosmetics and soaps
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| lawrencium |
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noun
- A transuranic chemical element (symbol Lr, formerly Lw) with atomic number 103.
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| LDPE |
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initialism - Low Density Polyethylene
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| leach |
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noun (leaches)
- A quantity of wood ashes, through which water passes, and thus imbibes the alkali.
- A tub or vat for leaching ashes, bark, etc.
verb (leaches, leaching, leached, leached)
- (transitive) To purge a soluble matter out of something by the action of a percolate, percolating fluid.
- Heavy rainfall can out minerals important for plant growth from the soil.
- The mercury in dental amalgams can out from the fillings into the body.
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| lead |
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noun
- (context, uncountable, element) A heavy, pliable, inelastic metal element, having a bright, bluish color, but easily tarnished; both malleable and ductile, though with little tenacity. It is easily fusible, forms alloys with other metals, and is an ingredient of solder and type metal. Atomic number 82, Atomic weight 206.4, Specific Gravity 11.37, Symbol Pb (from Latin plumbum).
- (countable) A plummet or mass of lead, used in sounding at sea.
- A thin strip of type metal, used to separate lines of type in printing.
- Sheets or plates of lead used as a covering for roofs.
- (context, in plural leads) A roof covered with lead sheets or terne plates.
- Quotations
- I would have the tower two stories, and goodly leads upon the top. " Bacon
- (countable) A cylinder of black lead or plumbago used in pencils.
verb
- (transitive) To cover, fill, or affect with lead; as, continuous firing leads the grooves of a rifle.
- (context, transitive, printing) To place leads between the lines of; as, to lead a page; leaded matter.
adjective
- (not comparable) foremost, Foremost.
- The contestants are all tied; no one has the lead position.
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| lead oxide |
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noun (wikipedia, Lead(II) oxide)
- (chemistry) a yellow oxide of lead, PbO?, used in the manufacture of paints and glass
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| levigate |
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verb
- An alternative spelling of lí¦vigate.
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| Lewis acid |
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noun
- (chemistry) Any electrophylic compound that can accept a pair of electrons and form a coordinate covalent bond
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| Lewis base |
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noun
- (chemistry) Any nucleophylic compound that can donate a pair of electrons and form a coordinate covalent bond.
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| Li |
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proper noun
- A surname of Chinese origin, a variant of Lee (See: �).
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| ligand |
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noun - (chemistry) An ion, molecule, or functional group that binds to another chemical entity to form a larger complex.
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| lime |
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noun
- (poetic) any gluey or adhesive substance; something which traps or captures someone
- (mineralogy) A white alkaline substance, calcium oxide, obtained from limestone; quicklime
- 1952: Lime, which is the product of the burning of chalk or limestone, might be bought ready burnt, or it could be burnt in kilns specially constructed in the neighbourhood of the building operations. — L.F. Salzman, Building in England, page 149.
- A dry white powder (calcium hydroxide).
verb (lim, ing)
- (transitive) To treat with calcium hydroxide or calcium oxide (lime).
adjective
- Containing lime or lime juice.
- lime-green, Lime-green.
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| linalool |
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noun - (chemistry) a monoterpene alcohol found in many essential oils
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| link |
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noun
- A connection between places, persons, events, or things.
- The mayor's assistant serves as the to the media.
- One element of a chain.
- The third of the silver chain needs to be resoldered.
- The weakest .
- (computing) The connection between busses or systems.
- A by-N- is composed of N lanes.
- (obsolete) A torch used to light dark streets.
verb
- (transitive): To connect two or more things.
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| linoleic |
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adjective - Of, or derived from linoleum, or linseed oil
- (chemistry) designating an organic fatty acid, a thin yellow oil, found combined as an ester of glycerol in oils of linseed, poppy, hemp, and certain nuts; it is a polyunsaturated fatty acid with 18 carbon atoms and two double bonds.
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| linoleic acid |
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noun
- an polyunsaturated fatty acid essential for human nutrition; it is found in linseed, sunflower and other vegetable oils
- (chemistry) 9,12-octadecadienoic acid CH3(CH2)4CH=CHCH2CH=CH(CH2)7COOH
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| liquidus |
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noun - (chemistry),(physics) a line, in a phase diagram, above which a given substance is a stable liquid
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| liquor |
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noun
- Strong alcoholic drink derived from fermentation and distillation (American English)
- liquid obtained by cooking meat or vegetables (or both)
verb
- (intransitive) To drink liquor, usually to excess.
- (transitive) To cause someone to drink liquor, usually to excess.
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| litharge |
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noun
- lead monoxide, PbO?, a toxic solid formed from the oxidisation of lead in air, and used as a pigment
- 1997: From an inner pocket he produces a costly Ramillies Wig, shakes it out in a brisk Cloud of scented Litharge, and claps it on, with a minimum of fuss, over his ascetic"s Crop. " Thomas Pynchon, Mason & Dixon
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| lithia |
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noun
- lithium oxide, Li2O, used in the manufacture of ceramics and glass
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| lithic |
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adjective
- Of or pertaining to stone; as, lithic architecture.
- (chemistry) of, or relating to lithium
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| lithium |
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noun
- (element) The simplest alkali metal, the lightest solid element, and the third lightest chemical element (symbol Li) with an atomic number of 3.
- (pharmaceutical drug) lithium carbonate, Lithium carbonate or other preparations of lithium metal used to treat manic depression and bipolar disorders.
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| lithium aluminum hydride |
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noun
- alternative spelling of lithium aluminium hydride
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| lithium carbonate |
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noun - (chemistry) The lithium salt of carbonic acid, Li2CO3, used in the manufacture of glass and ceramics, and medically, in the treatment of bipolar disorder.
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| lithium chloride |
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noun - (chemistry) the lithium salt of hydrochloric acid, LiCl?, used in the electrolytic production of lithium metal, and as a flux
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| lithium fluoride |
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noun (molecular formula LiF?)
- (chemistry) a salt that may be prepared by the action of hydrofluoric acid on many lithium compounds, and occurs naturally as griceite; its crystals are used in optical instruments, and in radiation dosimetry (based on its radiothermoluminescence)
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| lithium hydroxide |
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noun - (chemistry) an alkali, LiOH?, used in gas-purification systems in spacecraft, submarines etc, and in the preparation of lithium soap
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| lithium oxide |
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noun - (chemistry) a white, powdered alkali, Li2O, used in the manufacture of glass and ceramics
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| lithium stearate |
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noun - (chemistry) the lithium salt of stearic acid; a lithium soap made from tallow
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| litmus |
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noun
- A dyestuff extracted from certain lichens.
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| litmus test |
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noun - (chemistry) a simple test for the acidity or alkalinity of a substance, using litmus paper
- any over-simplistic test that uses a single indicator
- The President's policy on abortion is regarded as a of his views on women's rights.
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| liver |
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noun
- (anatomy) A large organ in the body that stores and metabolizes nutrients, destroys toxins and produces bile. Responsible for thousands of biochemical reactions.
- This livestock organ used as food.
- (color) A dark brown colour, tinted with red and gray, like that of liver.
- <table><tr><td>liver colour: </td><td bgcolor="
- 674C47" width="80"> </td></tr></table>
adjective (the noun as a modifier)<br>
(no (compar) or (superl) forms)
- Concerning or relating to the liver.
- liver transplant
- Intended for the liver.
- liver salts
- Of food, made of liver.
- liver pí¢té
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| lixiviate |
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verb
- to separate a substance into soluble and insoluble components through percolation
- 1997: the Slaves are out in the Storm, doing their Owners" Laundry, observing and reading each occurrence of Blood, Semen, Excrement, Saliva, Urine, Sweat, Road-Mud, dead Skin, and other such Data of Biography, whose pure form they practice Daily, before all is lixiviated "neath Heaven. " Thomas Pynchon, Mason & Dixon
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| LNG |
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initialism - Liquefied Natural Gas
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| loose |
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verb (looses, loosing, loosed)
- (transitive) To let loose, to free from restraints.
- (transitive) To unfasten, to loosen.
- (transitive) To make less tight, to loosen.
- (intransitive) Of a grip or hold, to let go.
adjective (loos, er)
- Not fixed in place tightly or firmly
- This wheelbarrow has a wheel
- Not held or packaged together
- You can buy apples in a pack, but they are cheaper
- Not bound or tethered or leashed
- The dog is again
- Not fitting closely
- I wear clothes when it is hot
- Not compact
- It is difficult walking on gravel
- relaxed
- She danced with a flowing movement
- indiscreet
- Loose talk costs lives
- (dated) promiscuous
- She is a woman
- (poker) A player who plays many hands
- (poker) A strategy which involves playing many hands
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| luminous paint |
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noun
- paint that glows in the dark; either energized by a radioactive salt, or by preexcitation by light
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| lunar |
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adjective
- Pertaining to the moon.
- Crescent shaped, lunate.
- Of, or relating to silver.
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| lutecium |
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noun
- (context, archaic, element) lutetium
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| lutetium |
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noun
- (element) A metallic chemical element (symbol Lu) with an atomic number of 71.
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| lye |
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noun
- A strong caustic alkaline solution of potassium or sodium salts, obtained by leaching wood ashes. It is much used in making soap as well as its use in biodiesel.
verb (infl, en, verb)
- (obsolete spelling of, lie)
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| lyophilic |
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adjective
- (context, of a colloid) Having an affinity for the dispersion medium and thus not easily precipitated.
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| lyotropic |
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adjective - (chemistry),(physics) describing a liquid crystal that exhibits phase transitions as a function of concentration
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| lysergic acid |
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noun
- (organic compound) An organic compound, 6-methyl-9,10-didehydro-ergoline-8-carboxylic acid, derived from an alkaloid found in ergot; its amide derivatives are widely used as pharmaceuticals and as hallucinogenic drugs (LSD).
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