placentation

不可数

A noun referring to the formation and arrangement of the placenta in the uterus, or the arrangement of ovules within the ovary.

• 🇨🇳指胎盘在子宫内的形成和位置，也指胚珠在子房内的着生方式。

1. Formation of the placenta C2 formal medical

   The process of formation and development of the placenta in the uterus during pregnancy.

   • Placentation begins shortly after the embryo implants in the uterine wall.
   • Abnormal placentation can lead to complications during pregnancy.
   • The study focused on the molecular mechanisms of placentation in mammals.

   🇨🇳胎盘形成

2. Arrangement of ovules C2 formal scientific

   The arrangement of ovules within the ovary of a plant, specifically how they are attached to the placenta.

   • Botanists classify plants based on their type of placentation.
   • The placentation in this species is parietal, with ovules attached to the ovary wall.
   • Axile placentation is common in many flowering plants.

   🇨🇳胎座式

• placentations plural form
• placentations' possessive plural form
• placentation's possessive singular form