Abactinal

2 definitions found

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

  Abactinal \Ab*ac"ti*nal\ ([a^]b*[a^]k"t[i^]*nal), a. [L. ab + E.
     actinal.] (Zool.)
     Pertaining to the surface or end opposite to the mouth in a
     radiate animal; -- opposed to {actinal}. "The aboral or
     abactinal area." --L. Agassiz.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  abactinal
       adj : (of radiate animals) located on the surface or end opposite
             to that on which the mouth is situated [ant: {actinal}]