Source : Webster's Revised Unabridged Dictionary (1913)

Ceresin \Cer"e*sin\, n. [L. cera wax.] (Chem.)
   A white wax, made by bleaching and purifying ozocerite, and
   used as a substitute for beeswax.

Source : WordNet®

ceresin
     n : a white wax extracted from ozokerite