abactinal Meaning, Definition & Usage

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

WordNet

Ab*ac"ti*nal adjective
Etymology
L. ab + E. actinal.
Definitions
  1. (Zoöl.) Pertaining to the surface or end opposite to the mouth in a radiate animal; -- opposed to actinal. "The aboral or abactinal area." L. Agassiz.

Webster 1913