n. [ See Croceous. ] (Chem.) A name given to any one of several yellow or scarlet dyestuffs of artificial production and complex structure. In general they are diazo and sulphonic acid derivatives of benzene and naphthol. [ 1913 Webster ]

a. [ L. croceus, fr. crocus saffron. See Crocus. ] Of, pertaining to, or like, saffron; deep reddish yellow. [ R. ] [ 1913 Webster ]

n. (Chem.) A dyestuff, obtained from the Chinese crocin, which produces a brilliant yellow. [ 1913 Webster ]