glossa
noun
glos·sa ˈglä-sə 
ˈglȯ-
plural glossae ˈglä-ˌsē
-ˌsī,
ˈglȯ-
also glossas : a tongue or lingual structure especially in an insect
especially : the median distal lobe of the labium of an insect
Word History
Etymology
borrowed from New Latin, borrowed from Greek glôssa "tongue" — more at gloss entry 3
First Known Use
circa 1852, in the meaning defined above