English Dictionary

actinal

adj

(zoology) Pertaining to the side or surface around the mouth in an animal that has radial symmetry such as a starfish. / (zoology) Pertaining to the axis of rotational symmetry in radiate animals.

The actinal movement of the robot was impressive.

意味（1）

(zoology) Pertaining to the side or surface around the mouth in an animal that has radial symmetry such as a starfish.

The so-called mouth is always placed at one of these poles, and from it radiate the most prominent organs, in consequence of which I have called this side of the body the oral or actinal area ...

意味（2）

(zoology) Pertaining to the axis of rotational symmetry in radiate animals.

[Professor Agassiz] gives the names of two axes of the animals; that around which the motion of the animal occurs is the actinal axis ...