[1] : The Collaborative International Dictionary of English v.0.48

lingua \lin"gua\ li^ng"gw.a, n.; pl. linguae
   li^ng"gw=e. l., the tongue. zool.
   a a tongue.
   b a median process of the labium, at the under side of the
       mouth in insects, and serving as a tongue.
       1913 webster
see also:
linguae 

[2] : WordNet (r) 2.0

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
see also:
tongue glossa clapper linguae 

Lingua >> L Words
Lingua, definition of term: Lingua
lingua_pag1.html

Lingua Franca >> L Words
Lingua Franca, definition of term: Lingua Franca
lingua+franca_pag1.html