anus

/ey-nuhs/US // ˈeɪ nəs //UK // (ˈeɪnəs) //

肛门,肛部,肛肛门,肛门处

Definitions

n.名词 noun

1
plural a·nus·es.Anatomy.
- : the opening at the lower end of the alimentary canal, through which the solid refuse of digestion is excreted.

Anus posterior, median; anterior tentacles, atrophied; foot broad.
Anus nearly always terminal, rarely dorsal, at a little distance from end of body.
Anus orange-coloured, and furnished with a bristle for oviposition.
Anus usually in the upper or oral half of the theca, and never aboral.
Anus in posterior interradius, on oral surface, closed by valvular pyramid.