The so-called mouth is always placed at one of these poles, and from it radiate the most prominent organs, in consequence of which I have called this side of the body the oral or actinal area ...
Source: wiktionary
Actinal
Synonyms for "actinal"
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Antonyms
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[Professor Agassiz] gives the names of two axes of the animals; that around which the motion of the animal occurs is the actinal axis ...
Source: wiktionary