All Words Glossary

Glossary of Chemistry Terms
beginning with letter N
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N
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noun
  1. The fourteenth letter of the Appendix:Roman script, English alphabet, preceded by M and followed by O.
abbreviation
  1. (military) Navy
NA
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initialism
  1. Narcotics Anonymous
naphtha
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noun
  1. (dated) Naturally-occuring liquid petroleum.
  2. Any of a wide variety of aliphatic or aromatic liquid hydrocarbon mixtures distilled from petroleum or coal tar, especially as used in solvents or petrol.
    • 1995, Philip Pullman, Northern Lights:
    • : The Common Room and the Library were lit by anbaric light, but the Scholars preferred the older, softer lamps in the Retiring Room.
naphthalene
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noun
  1. A white crystalline hydrocarbon manufactured from coal tar; used in mothballs.
  1. (organic compound) An aromatic bicyclic hydrocarbon, C10H8; an acene containing two fused benzene rings.
naphthene
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noun
  1. (chemistry) any cycloalkane (or alkyl derivative)
nascent
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adjective
  1. emerging; just coming into existence
India has a space industry.
  1. (chemistry) of the state of an element at the time it is generated from some compound
NB
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initialism or N.B.
  1. Nota bene; used in written English to introduce something to be noted.
NB: Do not write below this line.
  1. New Brunswick (Canadian province)
  2. North Bound
ND
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abbreviation
  1. North Dakota, a state of the United States of America.
  2. negligent, Negligent discharge, Discharge. Military, accidental firing of a weapon
NE
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abbreviation
  1. Nebraska, a state of the United States of America.
  2. northeast, Northeast, a cardinal point of the compass.
  3. not, Not evaluated.
  4. norepinephrine, Norepinephrine.
negative
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noun
  1. (photography) an image in which dark areas represent light ones, and the converse
  2. (grammar) a word that indicates negation
  3. (mathematics) a negative quantity
  4. (weightlifting): A rep performed with weight in which the muscle begins at maximum contraction and is slowly extended; a movement performed using only the eccentric phase of muscle movement.
adjective
  1. not positive or neutral
  2. inherently damaging; undesirable
  3. electrical charge of an electron and related particles
neodymium
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noun
  1. a metallic chemical element (symbol Nd) with an atomic number of 60.
neon
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noun
  1. The chemical element (symbol Ne) with an atomic number of 10.
  2. neon signs, collectively.
    1. a neon tetra fish
neon lamp
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noun
  1. a small gas discharge lamp containing neon gas, sometimes with other noble gases to add colour
neoprene
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noun
  1. a synthetic rubber, a polymer of chloroprene, commonly used in wetsuits etc
nephelometer
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noun
  1. (analytical chemistry) An instrument for measuring various aspects of the suspended particles in a fluid; especially in a colloid.
neutral
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noun
  1. A nonaligned state, or a member of such a state
  2. A person who takes no side in a dispute
  3. A neutral hue
  4. The position of a set of gears in which power cannot be transmitted to the drive mechanism
  5. An electrical terminal that is not electrified
adjective
  1. Not taking sides in a conflict such as war; nonaligned.
  2. Favouring neither the supporting nor opposing viewpoint of a topic of debate; unbiased.
  3. (grammar) Neither positive nor negative.
  4. Neither beneficial nor harmful.
  5. Having no sex; neuter.
  6. Having no obvious colour; gray
  1. (physics) Neither positive nor negative; possessing no charge or equivalent positive and negative charge such that there is no imbalance.
  2. (chemistry) Having a pH of 7, neither acidic nor alkaline.
neutralize
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verb (neutraliz, ing)
  1. To make inactive or ineffective.
    The antidote neutralized the toxin.
nickel
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noun
  1. (uncountable) A silvery elemental metal with an atomic number of 28 and symbol Ni.
  2. (US, Canada, countable) A coin worth 5 cents.
  3. (US slang; sometimes the nickel or the hot nickel) Interstate 5, a highway that runs along the west coast of the United States.
  4. (slang) A playing card with the rank of five
nickelic
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adjective
  1. Containing nickel.
  2. (chemistry) Containing trivalent nickel.
nickelous
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adjective
  1. Containing nickel.
  2. (chemistry) Containing bivalent nickel.
nicotine
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noun
  1. (chemistry) An alkaloid (C10H14N2), commonly occurring in the tobacco plant. In small doses it is a habit-forming stimulant, in larger doses it is toxic and is often used in insecticides. It is possibly a carcinogen.
niter
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noun (US spelling)
  1. (chemistry) A mineral form of potassium nitrate used in making gunpowder.
nitric oxide
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noun
  1. (chemistry) the binary compound of nitrogen and oxygen NO; an unstable compound which rapidly oxidizes in the presence of air
nitrogen dioxide
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noun
  1. (chemistry) the binary compound NO2, a brownish gas that is a poisonous air pollutant; it exists in equilibrium with dinitrogen tetroxide
nitrogen tetroxide
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noun
  1. (chemistry) dinitrogen tetroxide
nitrostarch
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noun
  1. an explosive powder prepared by the nitration of starch; used for demolition
noble
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noun
  1. An aristocrat; one of aristocratic blood
adjective
  1. Having honorable qualities; having moral eminence and freedom from anything petty, mean or dubious in conduct and character
He made a effort.
noble gas
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noun
  1. (chemistry) Any of the elements of group 0 of the periodic table, being monatomic and (with very limited exceptions) inert.
nonmetal
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noun
  1. (chemistry) an element, such as phosphorus or chlorine, that does not have the chemical or physical properties of a metal
nonmetallic
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adjective
  1. (chemistry) of, relating to, or having the properties of a nonmetal
    1. not metallic
nonpolar
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adjective
  1. (physics) not containing a dipole
  2. (chemistry) not ionic; not dissociating into ions when dissolved in water etc
NT
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initialism
  1. (stock symbol) w:Nortel, Nortel
  2. Northern Territory (of Australia)
  3. Northwest Territories (Canada)
  4. New Testament (Bible)
  5. New Territories (of Hong Kong)
  6. neurotensin
nucleophilic
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adjective nucleoophilic
  1. (chemistry) of, or relating to an nucleophile
nucleus
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noun (pl=nuclei, pl2=nucleuses)
  1. (context, chemistry, physics) The massive, positively charged central part of an atom made up of protons and neutrons.
  2. (cytology) A large organelle found in cells which contains genetic material.
  3. The central part (of something), round which others are collected.
  4. An initial part that will receive additions.
This collection will form the of a new library.
  1. (neuroanatomy) A cluster of many neuronal bodies where synapsing occurs.

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