1. Pertaining to, having or occurring by means of a placenta
   "all mammals except monotremes and marsupials are placental mammals"

1. Mammals having a placenta; all mammals except monotremes and marsupials
   "Humans are placental mammals, unlike kangaroos which are marsupials";
   - placental mammal, eutherian, eutherian mammal

Derived forms: placentals

See also: transplacental

Type of: mammal, mammalian

Antonym: aplacental

Part of: Eutheria, subclass Eutheria

Encyclopedia: Placental