Definitions

1. adjective

relating to or situated on the side of an organism away from the point of attachment of the main axis or from the point of entry of the principal nerve or vascular bundle, especially in relation to the oral or aboral end of a radiate animal.

“The abactinal end of the starfish is often overlooked in favor of its more familiar aboral end.”

2. noun

The abactinal side of an organism.

“The abactinal region of the coral was characterized by a dense growth of polyps.”