The Collaborative International Dictionary
carboxylic \car`box*yl"ic\ (k[aum]r`b[o^]ks*[i^]l"[i^]k), adj. (Chem.) of or pertaining to the carboxyl group; having a carboxyl group (written -COOH, -CO2H or -CO.OH); as, carboxylic acids are weakly acidic.
Syn: carboxyl.
Wiktionary
a. (context organic chemistry English) Of, or relating to the carboxyl functional group.
WordNet
adj. relating to or containing the carboxyl group or carboxyl radical [syn: carboxyl]
Wikipedia
Usage examples of "carboxylic".
Such a combination gives acid properties to a molecule and it is called a carboxylic acid group (carbon plus oxygen plus acid).
Amino acids combine to form a protein by having the amino group of one amino acid connected to the carboxylic acid group of its neighbor.
Imagine two central carbon atoms, each with a carboxylic acid group and an amine group attached.