arrangement of the ovules in the placenta and of the placentas in the ovary
详细解释:
plac.en.ta.tion n.(名词)
Formation of a placenta in the uterus.胎盘形成:胎盘在 * 中的形成过程The type or structure of a placenta.胎盘形式或构造Botany Arrangement of placentas within the ovary.【植物学】 胎座式:子房内胎座的组成形状