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Definitions from WordNet

Definitions from the Web

Abactinal

Definitions:

Adjective:

Referring to the upper or aboral surface of an echinoderm, particularly the upper surface of a sea star (Asterias) or a brittle star (Ophiuroidea).

Noun:

The aboral surface of an echinoderm.

Sample Sentences:

Adjective:

In order to protect itself, the sea star's abactinal surface is covered with small, pointed spines.

Noun:

The abactinal of the brittle star exhibits an intricate pattern of bony plates.

Possible Related Products:

• Sea Star Toys on Amazon
• Echinoderm Biology Books on Amazon