actinal

形容词 adj.
中文释义

英文释义

形容词 adj.
  1. 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 ...
  2. 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 ...

词汇关系

衍生词
actinally diactinal hexactinal interactinal monactinal pentactinal tetractinal triactinal
相关词
abactinal

词源

From Ancient Greek ἀκτίς, ἀκτῖν- (aktís, aktîn-, “ray”) + -al. The usage was coined by Louis Agassiz (See quotations below.).
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