柯林斯詞典placenta /pl??s?nt?/ (placentas) 1. N-COUNT The placenta is the mass of veins and tissue inside the uterus of a pregnant woman or animal, which the unborn baby is attached to. 胎磐[usu 'the' N] The drug can be transferred to the baby via the placenta. 該葯會通過胎磐傳給胎兒。 返回 placenta劍橋詞典the temporary organ that feeds a foetus (= developing baby ) inside its mother's womb 胎磐 返回 placenta