Source : Webster's Revised Unabridged Dictionary (1913)

Sinopite \Sin"o*pite\, n. [F., fr. L. sinopis (sc. terra), a red
   earth or ocher found in Sinope, a town in Paphlagoma, on the
   Black Sea, Gr. ????.] (Min.)
   A brickred ferruginous clay used by the ancients for red
   paint.