vagina

n. canal leading from the vulva to the uterus in the female mammal; sheath in a plant or animal

The vagina, (from Latin, literally "sheath" or "scabbard" ) is the tubular tract leading from the uterus to the exterior of the body in female placental mammals and marsupials, or to the cloaca in female birds, monotremes, and some reptiles. Female insects and other invertebrates also have a vagina, which is the terminal part of the oviduct. The Latinate plural (rarely used in English) is vaginae.
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Vagina /va·gi·na/ pl. vagi´nae [L.] 1. a sheath or sheathlike structure. 2. the canal in the female, from the vulva to the cervix uteri, that [more]Vagina - Community and Resources

Noun
1. the lower part of the female reproductive tract; a moist canal in female mammals extending from the labia minora to the uterus; "the vagina receives the penis during coitus"; "the vagina is elastic enough to allow the passage of a fetus"
(hypernym) duct, epithelial duct, canal, channel
(part-holonym) female genitalia, female genitals, female genital organ, fanny
(part-meronym) vaginal artery, arteria vaginalis

n. vagina, canal leading from the vulva to the uterus in the female mammal