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...

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

Zonaria :: Zonaria (n. pl.) A division of Mammalia in which the placenta is zonelike.

Placentae :: Placentae (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..

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

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..

Placentiform :: Placentiform (a.) Having the shape of a placenta, or circular thickened disk somewhat thinner about the middle..

Parietal :: Parietal (a.) Attached to the main wall of the ovary, and not to the axis; -- said of a placenta..

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

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

Trophosperm :: Trophosperm (n.) The placenta.

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

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..

Placenta :: Placenta (n.) The part of a pistil or fruit to which the ovules or seeds are attached.

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

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

Cotyledonary :: Cotyledonary (a.) Having a cotyledon; tufted; as, the cotyledonary placenta of the cow..

Sporophore :: Sporophore (n.) A placenta.

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

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

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