carboxyl group

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carboxyl group

(kɑːˈbɒksaɪl; -sɪl) or

carboxyl radical

n
(Elements & Compounds) the monovalent group –COOH, consisting of a carbonyl group bound to a hydroxyl group: the functional group in organic acids
[C19 carboxyl, from carbo- + oxy-2 + -yl]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Noun1.carboxyl group - the univalent radical -COOH; present in and characteristic of organic acids
chemical group, radical, group - (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
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