\Sto"rax\, n. [L. storax, styrax, Gr. ?. Cf. {Styrax}.]
Any one of a number of similar complex resins obtained from
the bark of several trees and shrubs of the Styrax family.
The most common of these is {liquid storax}, a brown or gray
semifluid substance of an agreeable aromatic odor and
balsamic taste, sometimes used in perfumery, and in medicine
as an expectorant.
Note: A yellow aromatic honeylike substance, resembling, and
      often confounded with, storax, is obtained from the
      American sweet gum tree ({Liquidambar styraciflua}),
      and is much used as a chewing gum, called sweet gum,
      and liquid storax. Cf. {Liquidambar}.