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substituent

 - 3 dictionary results

sub⋅stit⋅u⋅ent

  [suhb-stich-oo-uhnt]
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–noun
1. Chemistry. an atom or atomic group that takes the place of another atom or group present in the molecule of the original compound.
–adjective
2. having been or capable of being substituted.
Origin:
1890–95; < L substituent- (s. of substituēns), prp. of substituere to substitute, equiv. to sub- sub- + -stitu-, comb. form of statuere to set up, erect (see statue ) + -ent- -ent
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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sub·stit·u·ent   (səb-stĭch'ōō-ənt)   
n.  An atom, radical, or group substituted for another in a chemical compound.
adj.  Of or relating to such an atom or group.

[Latin substituēns, substituent-, present participle of substituere, to substitute; see substitute.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: sub·stit·u·ent
Pronunciation: s&b-'stich-(&-)w&nt
Function: noun
: an atom or group that replaces another atomor group in a molecule —substituent adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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