Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.


see reproductive systemreproductive system,
in animals, the anatomical organs concerned with production of offspring. In humans and other mammals the female reproductive system produces the female reproductive cells (the eggs, or ova) and contains an organ in which development of the fetus takes
..... Click the link for more information.



in biology.

(1) A sheath of various animal and plant organs—for ex-ample, the vagina of a tendon, of a nerve fiber, and of the notochord in certain fishes (Holocephali, Dipnoi, and Acipenseridae). The vagina of a leaf is the lower part of a leaf widened in the form of a canal and slightly (in the Umbelliferae) or greatly (in the grasses) extended to embrace the stem. The vagina protects the bud contained in the axil. In grasses, the vagina is a delicate extension of the base of the internode of the stem. In bananas, the vaginae of the leaves overlap one another to form a false high stem. In many plants the lower leaves, and in some plants all the leaves, are reduced and consist of a single vagina. Vagina is also the name given to the small saclike sheath or edging at the base of the stem of certain hymenomycetous fungi (fly agaric and death cup); it is the vestige of the so-called general spathe that surrounds the fruiting body of a young fungus and later ruptures. The presence (or absence) and the shape of both types of vagina is a regular characteristic used in classifying plants.

(2) The invagination of the skin in animals that serves as a receptacle of some organs is also called a vagina—for example, the vagina of a feather, of a hair, and of the tongue in snakes.

(3) The terminus of the genital canal in female mammals (marsupial and placental) that is used in sexual intercourse and for the emergence of the fetus. In some invertebrates (in several flatworms), the vagina is in the form of a tubelike twisting of the skin with one end opening to the outside and the other end facing the parenchyma. In tsetse flies, larvae develop in the dilated vagina. In mammals the vagina developed from the lower portion of the oviduct. It is paired in marsupials; in placental animals the oviducts merge to form a single vagina. The vagina changes further down into a shortened urogenital sinus which in female mammals forms the vestibule of the vagina. In marsupials, ungulates, rodents, lemurs, and primates, the hymen is situated between the vagina and the vestibule of the vagina.

(4) A muscular, distensible tube situated in the lesser pelvis of a woman between the urinary bladder and urethra in front and the rectum in back. In an adult, the vagina is approximately 7-8 cm in length along the anterior wall and 1.5-2 cm longer along the posterior wall. The direction of the vagina corresponds to the slope of the pelvis and forms a 100-110° angle with the corpus uteri. Entry into the vagina in virgins is blocked by the hymen. The vaginal wall consists of epithelial, muscular, and connective-tissue layers. It is lined with a mucous membrane that forms transverse folds and longitudinal ridges that diminish with age. These folds make it possible for the vagina to stretch considerably (for example, during birth as the fetus passes through). The vagina contains a small quantity (about 1 ml) of fluid, which is formed from blood serum seeping from the vascular walls and glandular discharges in the canal of the cervix uteri. The presence of lactic acid in this fluid makes it bactericidal. The vagina is the terminus of the genital conduction paths.



The canal from the vulvar opening to the cervix uteri.


The upper part of the pedestal of a terminus, from which the bust or figure seems to arise.


1. the moist canal in most female mammals, including humans, that extends from the cervix of the uterus to an external opening between the labia minora
2. Anatomy biology any sheath or sheathlike structure, such as a leaf base that encloses a stem
References in periodicals archive ?
Our vagina's, not ourselves: A critical analysis of The Vagina Monologues.
Los machos se emplearon tanto para la copula del grupo de alpacas que se les realizo la aspiracion vaginal de semen como para la coleccion se semen con vagina artificial.
Benign melanotic lesions of the vagina and/or cervix are uncommon and only few cases have been reported (2, 6).
See The Vagina Monologues at Crosby Civic Hall on November 12.
There are no references in the literature to bathwater or swim water entering the prepubertal vagina.
Angela Johnsen's monologue, "Hair," is an oddly sweet lament about how her character's philandering husband insisted that she shave her vagina.
The Vagina Monologues will be at Theatr Brycheiniog on June 6.
A study by researchers at the University of Sassari (Italy) found distension of the vagina with saline to be a reliable method for the assessment of rectovaginal endometriosis (Fertil.
By calling the labia a vagina, therefore, I argue that a displacement is effected that moves the very visible but not visually coded labia into the sphere of invisibility, turning "the horror of nothing to see" into "there's nothing to see here.
The play was written by Eve Ensler in 1996 and is really about women and their vaginas.
And Anneka, mum to Tom, 17, Josh, 15, and Sam, eight, told us: 'The Vagina Monologues is such a great show - it really hits the spot.
A middle-age housewife has her vagina surgically tightened, to her husband's great pleasure and to her own considerable pain.