noun. undefined

noun. A membranous vascular organ that develops in female eutherian mammals during pregnancy, lining the uterine wall and partially enveloping the fetus, to which it is attached by the umbilical cord. Following birth, the placenta is expelled.

noun. A similar organ in marsupial mammals, consisting of a yolk sac attached to the uterine wall.

noun. An organ with similar functions in some nonmammalian animals, such as certain sharks and reptiles.

noun. The part within the ovary of a flowering plant to which the ovules are attached.

noun. In zoöl., anat., and medicine: The organ of attachment of a vertebrate embryo or fetus to the wall of the uterus or womb of the female.

noun. In echinoderms, a flat discoidal sea-urchin, as a sand-dollar or cake-urchin: used in a generic sense by Klein, 1734.

noun. [capitalized] A genus of bivalve mollusks, now called Plaruna.

noun. In botany, that part of the ovary of flowering plants which bears the ovules.

noun. The vascular appendage which connects the fetus with the parent, and is cast off in parturition with the afterbirth.

noun. The part of a pistil or fruit to which the ovules or seeds are attached.

noun. A vascular organ in mammals, except monotremes and marsupials, present only in the female during gestation. It supplies food and oxygen from the mother to the foetus, and passes back waste. It is implanted in the wall of the uterus and links to the foetus through the umbilical cord. It is expelled after birth.

noun. In flowering plants, the part of the ovary where ovules develop; in non-flowering plants where the spores develop.

noun. the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus

noun. that part of the ovary of a flowering plant where the ovules form

"They say the placenta is a rich source of stem cells capable of transforming into many types of cells in the body, holding out the hope of using them to treat many human ailments including spinal-cord injury and diabetes."

allantoic placenta  annular placenta  basal placenta  battledore placenta  chorionic placenta  

placental  placentary  

reproductive structure  

Magenta  amenta  magenta  tormenta  

cyst  epididymis  gestation  neonate  ovary  

afterbirth  

placentae