adjective relating to the surface or end opposite to the mouth in certain animals, such as starfish
In anatomy, abactinal is used to describe the back or dorsal side of an organism, especially in relation to the orientation of certain structures or features.
In marine biology, abactinal is used to describe the dorsal surface of a sea star or other echinoderm, which may have specialized structures for respiration, movement, and protection.
Abactinal refers to the upper surface or side of an echinoderm, such as a starfish, that is opposite to the mouth and contains the madreporite.
Abactinal is a term used in zoology to describe the side of an animal opposite to its mouth or ventral side, particularly in reference to echinoderms.
In marine biology writing, the term 'abactinal' is used to describe the upper surface of a sea star or starfish.
A marine biologist may use the term 'abactinal' when studying the anatomy of echinoderms such as sea stars.
Zoologists studying sea star behavior may refer to the abactinal surface when discussing locomotion and feeding.