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[uh-meen, am-in]
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noun Chemistry.
  1. any of a class of compounds derived from ammonia by replacement of one or more hydrogen atoms with organic groups.

Origin of amine

First recorded in 1860–65; am(monium) + -ine2
Related formsa·min·ic [uh-mee-nik, uh-min-ik] /əˈmi nɪk, əˈmɪn ɪk/, adjectivea·min·i·ty [uh-min-i-tee] /əˈmɪn ɪ ti/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for aminity


  1. an organic base formed by replacing one or more of the hydrogen atoms of ammonia by organic groups

Word Origin

C19: from am (monium) + -ine ²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for aminity



"compound in which one of the hydrogen atoms of ammonia is replaced by a hydrocarbon radical," 1863, from ammonia + chemical suffix -ine (2).

Online Etymology Dictionary, © 2010 Douglas Harper

aminity in Medicine


(ə-mēn, ămēn)
  1. Any of a group of organic compounds of nitrogen that may be considered ammonia derivatives in which one or more hydrogen atoms have been replaced by one or more hydrocarbon radicals.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

aminity in Science


[ə-mēn, ămēn]
  1. Any of a group of organic compounds that may be considered derivatives of ammonia (NH3) in which one or more hydrogen atoms have been replaced by a hydrocarbon radical. In aniline (C6H5NH2), for example, one hydrogen atom has been replaced by a phenyl group (C6H5). Amines are produced by the decay of organic matter.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.