1650s, from Modern Latin ovarium "ovary" (16c.), from Medieval Latin ovaria "the ovary of a bird" (13c.), from Latin ovum "egg," from PIE *owyo-/*oyyo- "egg" (see egg (n.)). In classical Latin, ovarius meant "egg-keeper."
The reproductive organ in female animals that produces eggs and the sex hormones estrogen and progesterone. In most vertebrate animals, the ovaries occur in pairs. In mammals, the ovaries contain numerous follicles, which house the developing eggs (oocytes). See more at menstrual cycleovulation.
The part of a carpel or of a gynoecium made of fused carpels that contains the ovules in a flower. The ovary is located at the base of the carpel and ripens into a fruit after fertilization of one or more of the ovules. See more at flower.