\Pin"a*cone\, n. [From Gr. ?, ?, a tablet. So called
because it unites with water so as to form tablet-shaped
crystals.] (Chem.)
A white crystalline substance related to the glycols, and
made from acetone; hence, by extension, any one of a series
of substances of which pinacone proper is the type. [Written
also {pinakone}.]