actinal

/ak-tuh-nl, ak-tahyn-l/US // ˈæk tə nl, ækˈtaɪn l //UK // (ˈæktɪnəl, ækˈtaɪnəl) //

行动,行动上,行动的,行动派

Definitions

adj.形容词 adjective

1
Zoology.
- : having tentacles or rays.
- : pertaining to the oral area from which the arms or tentacles radiate.

It is situated on the actinal or ventral surface of the future starfish, and is related to the left peritoneal vesicle.
The plane of the actinal surface at first meets that of the abactinal at an acute or nearly right angle.
The larval mouth is transported into the centre of the actinal disc.