Source : Webster's Revised Unabridged Dictionary (1913)

Mexican \Mex"i*can\, a.
   Of or pertaining to Mexico or its people. -- n. A native or
   inhabitant of Mexico.

   {Mexican poppy} (Bot.), a tropical American herb of the Poppy
      family ({Argemone Mexicana}) with much the look of a
      thistle, but having large yellow or white blossoms.

   {Mexican tea} (Bot.), an aromatic kind of pigweed from
      tropical America ({Chenopodium ambrosioides}).

Source : WordNet®

Mexican tea
     n 1: Eurasian aromatic oak-leaved goosefoot with many
          yellow-green flowers; naturalized North America [syn: {Jerusalem
          oak}, {feather geranium}, {Chenopodium botrys}, {Atriplex
          mexicana}]
     2: rank-smelling tropical American pigweed [syn: {American
        wormseed}, {Spanish tea}, {wormseed}, {Chenopodium
        ambrosioides}]