肛こう後ごう尾び

noun

post-anal tail

A biological term referring to the tail region extending beyond the anus, characteristic of chordates during embryonic development.

• 脊せき椎つい動どう物ぶつの胚はいでは、肛こう後尾ごうびが一いち時じ的てきに形けい成せいされる。

  In vertebrate embryos, a post-anal tail is temporarily formed.