名詞 placentation:

1. the formation of the placenta in the uterus
2. arrangement of the ovules in the placenta and of the placentas in the ovary

plac.en.ta.tion

n.（名詞）

Formation of a placenta in the uterus.
胎盤形成：胎盤在子宮中的形成過程
The type or structure of a placenta.
胎盤形式或構(gòu)造
Botany Arrangement of placentas within the ovary.
【植物學(xué)】 胎座式：子房?jī)?nèi)胎座的組成形狀