Source : Webster's Revised Unabridged Dictionary (1913)

Patchouli \Pa*tchou"li\, Patchouly \Pa*tchou"ly\, n. [CF. F.
   patchouli; prob. of East Indian origin.]
   1. (Bot.) A mintlike plant ({Pogostemon Patchouli}) of the
      East Indies, yielding an essential oil from which a highly
      valued perfume is made.

   2. The perfume made from this plant.

   {Patchouly camphor} (Chem.), a substance homologous with and
      resembling borneol, found in patchouly oil.