Source : Webster's Revised Unabridged Dictionary (1913)

Pinacolin \Pi*nac"o*lin\, n. [Pinacone + L. oleum oil.] (Chem.)
   A colorless oily liquid related to the ketones, and obtained
   by the decomposition of pinacone; hence, by extension, any
   one of the series of which pinacolin proper is the type.
   [Written also {pinacoline}.]