English definition of Placenta

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Definition of placenta

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Placenta (n.) The vascular appendage which connects the fetus with the parent, and is cast off in parturition with the afterbirth..

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Secundine :: Secundine (n.) The afterbirth, or placenta and membranes; -- generally used in the plural..

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

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

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

Sporophore :: Sporophore (n.) A placenta.

Cotyledon :: Cotyledon (n.) One of the patches of villi found in some forms of placenta.

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

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

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

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..

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

Trophosperm :: Trophosperm (n.) The placenta.

Placentas :: Placentas (pl. ) of Placent.

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..

Placentae :: Placentae (pl. ) of Placent.

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

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

Spermaphore :: Spermaphore (n.) That part of the ovary from which the ovules arise; the placenta.

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..

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