Abactinal

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

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

CHE RIGUARDA LA SUPERFICIE O IL PUNTO OPPOSTO ALLA BOCCA IN UN ANIMALE RADIATO

B: (Biologi) abaktinal
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