American Heritage® Dictionary of the English Language, Fourth Edition
- n. The univalent radical, COOH, the functional group characteristic of all organic acids.
Century Dictionary and Cyclopedia
- n. A hypothetical organic radical having the formula COOH. It may be regarded as a compound radical made up of carbonyl (CO) and hydroxyl (OH). This carboxyl group (COOH) exists in all organic acids, its hydrogen being replaceable by a basic element or group, thus forming a salt, as acetic acid (CH3 COOH), sodium acetate (CH3 COONa), etc.
- n. organic chemistry A univalent functional group consisting of a carbonyl and a hydroxyl functional group (-CO.OH); characteristic of carboxylic acids.
GNU Webster's 1913
- n. (Chem.) 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
- adj. relating to or containing the carboxyl group or carboxyl radical
- n. the univalent radical -COOH; present in and characteristic of organic acids
- carb(o)- + ox(y)- + -yl. (American Heritage® Dictionary of the English Language, Fourth Edition)
“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.”
“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).”
“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?”
“Chemically, tannins are complex phenolic polymers containing aliphatic and phenolic hydroxyl groups and in some cases, carboxyl groups.”
“An organic chemical compound that contains both an amine group and a carboxyl group; the unit of structure of proteins.”
“The enzyme that facilitates the removal of carboxyl from an amino acid.”
“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.”
“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.”
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