Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of placental is as below...

Placentalia :: Placentalia (n. pl.) A division of Mammalia including those that have a placenta, or all the orders above the marsupials..

Placental :: Placental (a.) Of or pertaining to the Placentalia.

Implacentalia :: Implacentalia (n. pl.) A primary division of the Mammalia, including the monotremes and marsupials, in which no placenta is formed..

Implacental :: Implacental (n.) A mammal having no placenta.

Implacental :: Implacental (a.) Without a placenta, as marsupials and monotremes..

Lissencephala :: Lissencephala (n. pl.) A general name for all those placental mammals that have a brain with few or no cerebral convolutions, as Rodentia, Insectivora, etc..

Aplacental :: Aplacental (a.) Belonging to the Aplacentata; without placenta.

Placental :: Placental (n.) One of the Placentalia.

Marsupialia :: Marsupialia (n. pl.) A subclass of Mammalia, including nearly all the mammals of Australia and the adjacent islands, together with the opossums of America. They differ from ordinary mammals in having the corpus callosum very small, in being implacental, and in having their young born while very immature. The female generally carries the young for some time after birth in an external pouch, or marsupium. Called also Marsupiata..

Monodelphia :: Monodelphia (n. pl.) The group that includes all ordinary or placental mammals; the Placentalia. See Mammalia.

Placental :: Placental (a.) Of or pertaining to the placenta; having, or characterized by having, a placenta; as, a placental mammal..

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