1. (a.) Of or pertaining to the placenta; having, or characterized by having, a placenta; as, a placental mammal.
2. (a.) of or pertaining to the Placentalia.
3. (n.) One of the Placentalia.
| Placental 1. (a.) Of or pertaining to the placenta; having, or characterized by having, a placenta; as, a placental mammal. 2. (a.) of or pertaining to the Placentalia. 3. (n.) One of the Placentalia. | |