Pyr″o‐coll (pĭr″ō̍‐kŏl), n. [Puro- + Gr. κόλλα glue.] (Chem.) A yellow crystalline substance allied to pyrrol, obtained by the distillation of gelatin.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.