Abactinal

[æb'æktinәl]

(adj.) (of radiate animals) located on the surface or end opposite to that on which the mouth is situated .

Checker: Merle--From WordNet

(a.) Pertaining to the surface or end opposite to the mouth in a radiate animal; -- opposed to actinal.

Typed by Damian

adj. (zool.) remote from the actinal area without rays.—adv. Abac′tinally.

Checker: Nicole