(Zoology)(in many invertebrate animals) a tubule open to the exterior which acts as an organ of excretion or osmoregulation. It typically has ciliated or flagellated cells and absorptive walls (动)(许多无脊椎动物的)管肾,肾管
派生 nephridial adjective 语源
late 19th cent.: modern Latin, from Greek nephrion (diminutive of nephros 'kidney') + the diminutive ending -idium