aboral

adj. away from or opposite the mouth (Anatomy, Zoology)

In biology, aboral surfaces are surfaces away from or opposite the mouth. The term is a compound of the Latin preposition ā, a, abs, meaning from or away from and the noun ōs, ōris n., meaning mouth.
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Adjective
1. opposite to or away from the mouth; "the aboral surface of a starfish"
(antonym) oral
(classification) anatomy, general anatomy

(a.)
Situated opposite to, or away from, the mouth.
  

aboral
tính từ (sinh học) xa miệng; đối miệng
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