vagina

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Anatomy The passage leading from the opening of the vulva to the cervix of the uterus in female mammals.
2. n. Anatomy A similar part in some invertebrates.
3. n. Botany A sheathlike structure, such as the leaf of a grass that surrounds a stem.

Century Dictionary and Cyclopedia

1. n. In botany, the sheath formed by the basal part of certain leaves where they embrace the stem: a sheath.
2. n. In anatomy and zoology, a sheath; a sheathing or covering part or organ; a case: specifically applied to various structures. The sexual passage of the female from the vulva to the uterus. In all the higher Mammalia it is the terminal section of a Müllerian duct or oviduct united with its fellow; in the lower it is double, wholly or in part, there being two more or less complete vaginæ, right and left. In some oviparous animals, as birds, the termination of the oviduct, beyond the uterine Part, receives the name of vagina. See uterus, and cut under peritoneum, In entomology, a sheath-like plate or part inclosing an organ. In some cases also called valve. Specifically— The long channeled labrum of the mosquito and other blood-sucking flies, in which the lancet-like mandibles and maxillæ are concealed. The jointed sheath of the promuscis of hemipterous insects, homologous with the labium of a typical insect. The parts supporting and covering the tongue of a bee. corresponding to the mentum, maxillæ. and palpi. The tubular sheath of the sting of a bee or wasp.
3. n. In architecture, the upper part of the pedestal of a terminus, from which the bust or figure seems to issue or arise; a sheath or gaine. [Rare or obsolete.]

Wiktionary

1. n. anatomy The passage leading from the opening of the vulva to the cervix of the uterus for copulation and childbirth in female mammals.
2. n. zoology A similar part in some invertebrates.
3. n. botany A sheath-like structure, such as the leaf of a grass that surrounds a stem.
4. n. colloquial The vulva.

GNU Webster's 1913

1. n. A sheath; a theca.
2. n. Specifically, the canal which leads from the uterus to the external orifice of the genital canal, or to the cloaca.
3. n. (Zoöl.) The terminal part of the oviduct in insects and various other invertebrates. See Illust., of Spermatheca.
4. n. (Bot.) The basal expansion of certain leaves, which inwraps the stem; a sheath.
5. n. (Arch.) The shaft of a terminus, from which the bust or figure seems to issue or arise.

WordNet 3.0

1. n. the lower part of the female reproductive tract; a moist canal in female mammals extending from the labia minora to the uterus