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Definitions from WordNet

Definitions from the Web

Actinal

Definition:

Actinal is an adjective that refers to something pertaining to or situated on the side of the oral region or mouth of an organism, especially in relation to the sea urchins and other echinoderms.

Sense 1:

Adjective

Relating to or located on the oral side of a sea urchin or echinoderm.

Example sentence: The actinal surface of the sea urchin contains its mouth and various feeding structures.

Sense 2:

Adjective

In biology, relating to the side of an organism or body part that is towards the mouth.

Example sentence: The actinal plates of the echinoderm form a protective shield around its oral region.

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