1. relating to or having a placenta
Usage: medical; biological
2. belonging to the group of mammals that nourish their young through a placenta during pregnancy
Usage: biological

1. a mammal that has a placenta during pregnancy
Usage: biological

Examples

• The doctor examined the placental tissue after delivery.
• Placental mammals include humans, dogs, and whales.
• Most placental species have longer gestation periods than marsupials.
• The placental connection provides nutrients to the developing fetus.
• Elephants are placentals with very long pregnancy periods.
• Scientists study placental development in various mammalian species.