Source : Webster's Revised Unabridged Dictionary (1913)

Lingua \Lin"gua\ (l[i^][ng]"gw[.a]), n.; pl. {Lingu[ae]}
   (-gw[=e]). [L., the tongue.] (Zo["o]l.)
   (a) A tongue.
   (b) A median process of the labium, at the under side of the
       mouth in insects, and serving as a tongue.

Source : WordNet®

lingua
     n : a mobile mass of muscular tissue covered with mucous
         membrane and located in the oral cavity [syn: {tongue}, {glossa},
          {clapper}]
     [also: {linguae} (pl)]