noun
- Mammals that develop a placenta and carry their young internally until birth; members of the infraclass Eutheria.
Usage: plural of eutherian; scientific/biological term; also called placental mammals
Examples
- Eutherians include humans, dogs, whales, and bats.
- Most mammals alive today are eutherians.
- Eutherians have a more developed placenta than marsupials.
- The fossil record shows that eutherians diversified rapidly after the extinction of dinosaurs.
- Primates and carnivores are both groups of eutherians.