Source : Webster's Revised Unabridged Dictionary (1913)

Glossa \Glos"sa\, n.; pl. {Gloss?}. [NL., fr. Gr. ? the tongue.]
   (Zo["o]l.)
   The tongue, or lingua, of an insect. See {Hymenoptera}.

Source : WordNet®

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