n. (Chem.) A white crystalline substance regarded as a hydrate of oil of turpentine. [ 1913 Webster ]
n. [ Terpin + L. oleum oil. ] (Chem.) Any oil substance having a hyacinthine odor, obtained by the action of acids on terpin, and regarded as a related hydrate. [ 1913 Webster ]
n. (Zool.) A land tortoise. [ Obs. ] [ 1913 Webster ]