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Meaning of terpin hydrate

ter'pin hy'drate

Pronunciation: (tûr'pin), [key]
— Pharm. Pharm.
  1. a white, crystalline powder, CHO&multiplydot;HO, usually used in combination with codeine, as an expectorant.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.