adjective
- of, relating to, or belonging to mammals that have a placenta and carry their young internally until birth
Usage: technical/scientific
noun
- a mammal of the group Eutheria, characterized by the presence of a placenta; a placental mammal
Usage: technical/scientific
Examples
- Humans are eutherians, as are dogs, whales, and most other familiar mammals.
- The eutherian placenta allows for extended fetal development inside the mother.
- Eutherians make up the vast majority of living mammal species.
- Unlike marsupials, eutherians give birth to relatively mature offspring.
- The fossil record shows that eutherians diversified rapidly after the extinction of dinosaurs.
- Most eutherian mammals have a gestation period of several months.