1. plural of placentation; the arrangement, structure, or formation of the placenta in plants or animals
Usage: technical; biology
2. in botany, the arrangement of ovules within the ovary of a flower
Usage: technical; botany

Examples

• Different placentations in flowering plants determine how seeds are distributed within the fruit.
• The botanist studied various placentations to classify the plant species.
• Placentations vary significantly among mammalian species, affecting fetal development.
• The student examined placentations under the microscope to understand ovule attachment.
• Comparative placentations across plant families reveal evolutionary relationships.