Source : Webster's Revised Unabridged Dictionary (1913)

Abranchial \A*bran"chi*al\, a. (Zo["o]l.)
   Abranchiate.

Source : WordNet®

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