[′bik·sən] (organic chemistry) C25H30O4 A carotenoid acid occurring in the seeds of Bixa orellano; used as a fat and food coloring agent.
bixin
bix·in
(bik'sin), A monomethyl ester of a 24-carbon branched unsaturated dicarboxylic acid; a carotenoid (a carotene-dioic acid); the orange-red coloring matter from seeds of Bixa orellana; the ethyl ester is used as a food and drug colorant. See also: annotto.