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The Collaborative International Dictionary
Cryptidine

Cryptidine \Cryp"ti*dine\ (kr?p"t?-d?n; 104), n. [Gr. krypto`s hidden.] (Chem.) One of the quinoline bases, obtained from coal tar as an oily liquid, C11H11N; also, any one of several substances metameric with, and resembling, cryptidine proper. [1913 Webster] ||

Wiktionary
cryptidine

n. 1 (context chemistry English) One of the quinoline bases, obtained from coal tar as an oily liquid, C11H11N. 2 Any of several substances metameric with, and resembling, cryptidine proper.