Source : Webster's Revised Unabridged Dictionary (1913)

Mescal \Mes*cal"\, n. [Sp.]
   A distilled liquor prepared in Mexico from a species of
   agave. See {Agave}.

Source : WordNet®

mescal
     n 1: a small spineless globe-shaped cactus; source of mescal
          buttons [syn: {mezcal}, {peyote}, {Lophophora williamsii}]
     2: a colorless Mexican liquor distilled from fermented juices
        of certain desert plants of the genus Agavaceae
        (especially the century plant)