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 placenta is as below...

Trophosperm :: Trophosperm (n.) The placenta.

Aplacentata :: Aplacentata (n. pl.) Mammals which have no placenta.

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

Afterbirth :: Afterbirth (n.) The placenta and membranes with which the fetus is connected, and which come away after delivery..

Ovule :: Ovule (n.) The rudiment of a seed. It grows from a placenta, and consists of a soft nucleus within two delicate coatings. The attached base of the ovule is the hilum, the coatings are united with the nucleus at the chalaza, and their minute orifice is the foramen..

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..

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

Metadiscoidal :: Metadiscoidal (a.) Discoidal by derivation; -- applied especially to the placenta of man and apes, because it is supposed to have been derived from a diffused placenta..

Acetabulum :: Acetabulum (n.) One of the lobes of the placenta in ruminating animals.

Decidua :: Decidua (n.) The inner layer of the wall of the uterus, which envelops the embryo, forms a part of the placenta, and is discharged with it..

Placentation :: Placentation (n.) The mode of formation of the placenta in different animals; as, the placentation of mammals..

Sporophore :: Sporophore (n.) A placenta.

Polycotyledonary :: Polycotyledonary (a.) Having the villi of the placenta collected into definite patches, or cotyledons..

Placentary :: Placentary (a.) Having reference to the placenta; as, the placentary system of classification..

Placentiferous :: Placentiferous (a.) Having or producing a placenta.

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

Placentation :: Placentation (n.) The mode in which the placenta is arranged or composed; as, axile placentation; parietal placentation..

Placentas :: Placentas (pl. ) of Placent.

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

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..

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