ovary

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One of the paired female reproductive organs that produce eggs and female sex hormones in humans and other vertebrates.
• noun An analogous gland in an invertebrate animal, such as a flatworm or a mollusk.
• noun Botany The ovule-bearing lower part of a pistil that ripens into a fruit.

from The Century Dictionary.

• Of or pertaining to an ovation.
• noun That part of a female animal in which ova, eggs, or germs are generated and matured; the essential female organ of reproduction, corresponding to the testes of the male; the female genital gland or germ-gland; the ovarium.
• noun In botany, a closed case or receptacle, the lower section of the pistil, inclosing the ovules or young seeds, and ultimately becoming the fruit.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) That part of the pistil which contains the seed, and in most flowering plants develops into the fruit. See Illust. of flower.
• noun (Zoöl. & Anat.) The essential female reproductive organ in which the ova are produced. See Illust. of Discophora.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun anatomy A female reproductive organ, often paired, that produces ova and in mammals secretes the hormones estrogen and progesterone.
• noun botany The lower part of a pistil or carpel that bears ovules and ripens into fruit.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the organ that bears the ovules of a flower
• noun (vertebrates) one of usually two organs that produce ova and secrete estrogen and progesterone