• synonyms


  1. containing the carboxyl group.
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Origin of carboxyl

First recorded in 1865–70; carb- + ox(ygen) + -yl
Related formscar·box·yl·ic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for carboxyl

Historical Examples

  • Entrance of the carboxyl or sulpho groups weakens toxic action.

    Poisons: Their Effects and Detection

    Alexander Wynter Blyth

  • The carboxyl group constitutes another convenient starting-point for the orientation of many types of organic compounds.

  • When treated with alkalies, they lose their carboxyl groups and become ætioporphyrin.

    The Chemistry of Plant Life

    Roscoe Wilfred Thatcher

carboxyl in Medicine


  1. The univalent radical, COOH, characteristic of all organic acids.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

carboxyl in Science


  1. The radical COOH, characteristic of all carboxylic acids.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.