Source : Webster's Revised Unabridged Dictionary (1913)

Abranchiate \A*bran"chi*ate\, a. (Zo["o]l.)
   Without gills.

Source : WordNet®

abranchiate
     adj : having no gills [syn: {abranchial}, {abranchious}, {gill-less}]
           [ant: {branchiate}]