In a manner relating to or along the actinal surface; with respect to the oral or mouth-bearing side of a radially symmetrical organism.
From actinal combined with the adverb suffix -ly, forming an adverb that describes action or position relative to the actinal surface.
Marine biologists use this term when describing how animals move or feed along their actinal side—it's the specialized vocabulary that lets them precisely communicate about the three-dimensional orientation of sea creatures!
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