placenta

名词 n.
中文释义

英文释义

名词 n.
  1. An organ in most mammals during gestation that supplies food and oxygen to the foetus and passes back waste. It is on the wall of the uterus and links to the foetus through the umbilical cord. It is expelled after birth.
  2. In flowering plants, the part of the ovary where ovules develop; in non-flowering plants where the spores develop.

词形变化

placentae plural placentas plural

词汇关系

衍生词
placenta cake placental placenta praevia placentary placentation placentiferous placentiform placentitis placento- placentome pseudoplacenta subplacenta
并列词
amnion amnio- chorion chorio-

词源

Elision for phrases such as New Latin placenta uterī (“womb cake”), placenta uterina (“uterine cake”), from Latin placenta (“flat cake”), because of the flat round shape of the afterbirth.
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