met.a.neph.ros

n.（名詞）
The third and final excretory organ that develops in a vertebrate embryo. In birds, reptiles, and mammals it replaces the mesonephros as the functional excretory organ and develops into the adult kidney.
后腎：脊椎動(dòng)物胚胎發(fā)育中的第三個(gè)也是最后一個(gè)排泄器官。在鳥(niǎo)類(lèi)、爬行動(dòng)物和哺乳動(dòng)物中它代替中腎起排泄器官的作用，并最終發(fā)育成腎

來(lái)源：
meta-
meta-
Greek nephros [kidney]
希臘語(yǔ) nephros [腎臟]