Cin·na·mon n.  (a) The inner bark of the shoots of Cinnamomum Zeylanicum, a tree growing in Ceylon. It is aromatic, of a moderately pungent taste, and is one of the best cordial, carminative, and restorative spices. (b) Cassia.
 Cinnamon stone Min., a variety of garnet, of a cinnamon or hyacinth red color, sometimes used in jewelry.
 Oil of cinnamon, a colorless aromatic oil obtained from cinnamon and cassia, and consisting essentially of cinnamic aldehyde, C6H5.C2H2.CHO.
 Wild cinnamon. See Canella.

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 Cinnamomum zeylanicum
      n : tropical Asian tree with aromatic yellowish-brown bark;
          source of the spice cinnamon [syn: cinnamon, {Ceylon
          cinnamon, Ceylon cinnamon tree]