from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The univalent radical, COOH, the functional group characteristic of all organic acids.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A univalent functional group consisting of a carbonyl and a hydroxyl functional group (-CO.OH); characteristic of carboxylic acids.

from the GNU version of the Collaborative International Dictionary of English

  • n. The complex radical, CO.OH, regarded as the essential and characteristic constituent which all oxygen acids of carbon (as formic, acetic, benzoic acids, etc.) have in common; -- called also oxatyl.

from The Century Dictionary and Cyclopedia

  • n. A hypothetical organic radical having the formula COOH.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. relating to or containing the carboxyl group or carboxyl radical
  • n. the univalent radical -COOH; present in and characteristic of organic acids


from The American Heritage® Dictionary of the English Language, 4th Edition

carb(o)- + ox(y)- + -yl.


  • Many of the compounds in asphalt are polar since they contain alcohol, carboxyl, phenolic, amine, thiol, and other functional groups.


  • A xenobiotic that has undergone a Phase I reaction is now a new intermediate metabolite that contains a reactive chemical group, e.g., hydroxyl (- OH), amino (- NH2), and carboxyl (- COOH).


  • BTW, the system is not awfully wrong: the negative charge on the acidic carboxyl groups is to be expected.

    Archive 2008-01-01

  • Within the hydrophobic environment in the center of the green fluorescent protein, a reaction occurs between the carboxyl carbon of Ser65 and the amino nitrogen of Gly67 that results in the formation of an imidazolin-5-one heterocyclic nitrogen ring system (as illustrated in Figure 2).

    Archive 2005-10-01

  • Secondly, regarding the hyper-IgM syndrome type 2 that affects the carboxyl-terminus of AID and abolishes CSR - do these truncations affect protein stability or is that known?

    3 recent reports use evolution to study mechanisms of antibody diversification - The Panda's Thumb

  • Chemically, tannins are complex phenolic polymers containing aliphatic and phenolic hydroxyl groups and in some cases, carboxyl groups.

    Chapter 4

  • An organic chemical compound that contains both an amine group and a carboxyl group; the unit of structure of proteins.

    Alcohol and The Addictive Brain

  • The enzyme that facilitates the removal of carboxyl from an amino acid.

    Alcohol and The Addictive Brain

  • I have therefore developed the determination of the carboxyl group by acidimetry by using phenolphthalein as indicator; I have further elaborated the determination of the methoxy and methylimide groups.

    Fritz Pregl - Nobel Lecture

  • That is, that one end of the gene codes for the amino end of the polypeptide chain and the other for the carboxyl end, and that as one proceeds along the gene one comes in turn to the codons in between in the linear order in which the amino acids are found in the polypeptide chain.

    Francis Crick - Nobel Lecture


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