Cro″ce‐in (kr?″s?–?n), 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.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.