ovary (vertebrates) one of usually two organs that produce ova and secrete estrogen and progesterone
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Wiktionary
Substantiv
placenta -
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.
placenta -
In flowering plants, the part of the ovary where ovules develop; in non-flowering plants where the spores develop.
Wikipedia
The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother's blood supply. Placentas are a defining characteristic of eutherian or "placental" mammals, but are also found in some snakes and lizards with varying levels of development up to mammalian levels. The word placenta comes from the Latin for cake, from Greek plakóenta/plakoúnta, accusative of plakóeis/plakoús – πλακόεις, πλακούς, "flat, slab-like", in reference to its round, flat appearance in humans.
OmegaWiki Dictionary
Ω
placenta That part of the ovary of a flowering plant where the ovules form.
placenta The vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus.
