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verb (used with object), car·box·yl·at·ed, car·box·yl·at·ing.
  1. to introduce the carboxyl group into (an organic compound).
  1. a salt or ester of a carboxylic acid.

Origin of carboxylate

First recorded in 1925–30; carboxyl + -ate2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for carboxylate


  1. any salt or ester of a carboxylic acid having a formula of the type M(RCOO) x, where M is a metal and R an organic group, or R 1 COOR², where R 1 and R² are organic groups
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

carboxylate in Science


  1. A salt or ester of an organic acid, containing the radical COO. Soaps, which are usually the sodium or potassium salts of fatty acids, are carboxylates.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.