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The Collaborative International Dictionary

Anus \A"nus\, n. [L., prob. for asnus: cf. Gr. ? to sit, Skr. [=a]s.] (Anat.) The posterior opening of the alimentary canal, through which the excrements are expelled.

Douglas Harper's Etymology Dictionary

"inferior opening of the alimentary canal," 1650s, from Old French anus, from Latin anus "ring, anus," from PIE root *ano- "ring." So called for its shape; compare Greek daktylios "anus," literally "ring (for the finger)," from daktylos "finger."


n. (context anatomy English) The lower orifice of the alimentary canal, through which feces and flatus are ejected.


n. excretory opening at the end of the alimentary canal [syn: arse, arsehole, asshole]


The anus (, which is from Proto-Indo-European*h₁eh₂no-, meaning "ring") is an opening at the opposite end of an animal's digestive tract from the mouth. Its function is to control the expulsion of feces, unwanted semi-solid matter produced during digestion, which, depending on the type of animal, may include: matter which the animal cannot digest, such as bones; food material after all the nutrients have been extracted, for example cellulose or lignin; ingested matter which would be toxic if it remained in the digestive tract; and dead or excess gut bacteria and other endosymbionts.

Amphibians, reptiles, and birds use the same orifice (known as the cloaca) for excreting liquid and solid wastes, for copulation and egg-laying. Monotreme mammals also have a cloaca, which is thought to be a feature inherited from the earliest amniotes via the therapsids. Marsupials have a single orifice for excreting both solids and liquids and, in females, a separate vagina for reproduction. Female placental mammals have completely separate orifices for defecation, urination, and reproduction; males have one opening for defecation and another for both urination and reproduction, although the channels flowing to that orifice are almost completely separate.

The development of the anus was an important stage in the evolution of multicellular animals. It appears to have happened at least twice, following different paths in protostomes and deuterostomes. This accompanied or facilitated other important evolutionary developments: the bilaterian body plan, the coelom, and metamerism, in which the body was built of repeated "modules" which could later specialize, such as the heads of most arthropods, which are composed of fused, specialized segments.

Anus (disambiguation)

In anatomy, the anus is the opening at the lower end of the digestive tract.

Anus can also refer to:

  • Anus language
  • Anu (tribe)
  • Anuš, the spelling of Enosh in the religion of Mandaeism
  • Anusim, Jews forced to convert to another faith who still secretly practice Judaism
  • Anus (album), an album by Alaska Thunderfuck
  • Places:
    • Anus, Yonne, France
    • Anus, Indonesia, a small village in Indonesia
    • Anus, Batangas, Philippines, in the province of Batangas
    • Anus, Laguna, Philippines, a small village in the province of Laguna
Anus (album)

Anus is the debut studio album by American drag queen Alaska Thunderfuck. It was released on June 23, 2015, through Sidecar Records. Musically, the album is compiled of pop and dance music, with electronic elements, and features appearances from fellow RuPaul's Drag Race contestants, season four contestant Willam, and season six contestants Courtney Act and Laganja Estranja.

Usage examples of "anus".

Bonnain and Payne have observed analogous cases of this abnormality of the vaginal opening and subsequent accouchement by the anus.

I nose your onur to be a genteelman of more onur and onesty, if I ever said ani such thing, to repete it to hurt a pore servant that as alwais add thee gratest respect in thee wurld for ure onur.

The commonly associated defects are: More or less completely septate bladder, atresia ani, or more rarely double anus, double urethra, increased breadth of the bony pelvis with defect of the symphysis pubis, and possibly duplication of the lower end of the spine, and hernia of some of the abdominal contents into a perineal pouch.

Anorectal atresia is the ordinary imperforation of the anus, in which the rectum terminates in the middle of the sacral cavity.

Arand mentions recovery after atresia of the anus with passage of excrement from the vulva.

The Discovery leaked black diesel smoke from its rusty anus and the inappropriate pale blue clunky interior designed by Sir Terence Conran was filthy and falling to bits, but Cicely felt it would do the job.

Cazin and Rey both produced abortion by forcible dilatation of the anus for fissure, but Gayet used both the fingers and a speculum in a case at five months and the woman went to term.

His rigid penis was fully ensheathed, probably within the mouth of she who owned his head, and his anus was distended by other tongues.

The statues of Christ were equipped with a phallus for fellatio by both the men and the women, and also for insertion into the vagina of the women and the anus of the men.

After suffering from invagination of the bowel and inflammation of the ovarian tissue, an ovary was discharged through an opening in the sigmoid flexure, and thence expelled from the anus.

Paaker, and Ani shows himself inclined to make use of him, then say to him that I may know a secret--and I do know one, I alone--which may make the Mohar the sport of his wishes, and that I may be disposed to sell it.

Presently Ani raised his wine-cup, and drank to the happy issue of his reconnoitring-expedition, and a victorious conclusion to every struggle in which the Mohar might engage.

After labor, sloughing of the parts commenced and progressed to such an extent that in one month there were no traces of the labia, nymphae, vagina, perineum, or anus.

The thermometer was variously placed in the mouth, anus, axilla, popliteal space, groin, urethra, and different instruments were from time to time employed.

Sometimes it presents flaccid bullae like pemphigus foliaceus, and then there are crusts as well as scales, with rhagades on the mouth, anus, etc.