Source : Webster's Revised Unabridged Dictionary (1913)

Sintoc \Sin"toc\, n.
   A kind of spice used in the East Indies, consisting of the
   bark of a species of {Cinnamomum.} [Written also {sindoc}.]

Source : WordNet®

Cinnamomum
     n : Asiatic and Australian aromatic trees and shrubs [syn: {genus
         Cinnamomum}]