The Collaborative International Dictionary of English v.0.48:
Aboral \Ab*o"ral\, a. [L. ab. + E. oral.] (Zool.) Situated opposite to, or away from, the mouth. [1913 Webster]WordNet (r) 3.0 (2006):
aboral adj 1: opposite to or away from the mouth; "the aboral surface of a starfish" [ant: oral]