amino

[uh-mee-noh, am-uh-noh]
adjective Chemistry.
containing the amino group.

Origin:
1900–05; independent use of amino-

Dictionary.com Unabridged

amino-

a combining form used in the names of chemical compounds in which the amino group is present: aminobenzene.
Also, -amine; especially before a vowel, amin-.


Origin:
amine + -o-

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
amino (əˈmaɪnəʊ, -ˈmiː-)
 
n
(modifier) of, consisting of, or containing the group of atoms -NH2: amino group or radical; amino acid

amino-
 
combining form
indicating the presence of an amino group: aminobenzoic acid
 
[from amine]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

amino
1887, in compound words involving chemicals, from amine (1863) "chemical compound formed from ammonia" (q.v.). Amino acid is attested from 1898.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

amino a·mi·no (ə-mē'nō, ām'ə-nō')
adj.
Relating to an amine or other compound containing an NH2 group combined with a nonacid organic radical.

amino- pref.
Containing the radical NH2 combined with a nonacid organic radical: aminobenzoic acid.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
amino   (ə-mē'nō, ām'ə-nō')  Pronunciation Key 
Relating to an amine or other chemical compound that contains the group NH2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
It is a complete amino acid and is unusually high in protein for a seed.
It's a fact that asparagus, a member of the lily family, contains the sulfurous
  amino acid methionine.
Proteins are made up of amino acids, some that are attracted to water, others
  that are repelled by water.
They re-supply the body with carbohydrates, usually antioxidants and sometimes
  amino acids and caffeine.
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