from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The opening at the lower end of the alimentary canal through which solid waste is eliminated from the body.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The lower opening of the alimentary canal, through which feces and flatus are ejected.
from the GNU version of the Collaborative International Dictionary of English
- n. The posterior opening of the alimentary canal, through which the excrements are expelled.
from The Century Dictionary and Cyclopedia
- n. The termination of the digestive tube or alimentary canal; the end of the enteron of any animal; the orifice through which the refuse of digestion is voided.
- n. A suffix of Latin adjectives and nouns thence derived: common in New Latin names, especially specific names.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the excretory opening at the end of the alimentary canal
Middle English, from Latin ānus, ring, anus.(American Heritage® Dictionary of the English Language, Fourth Edition)
First attested in 1658, from Old French anus, from Latin ānus ("ring, anus"), from Proto-Indo-European *ano- (“ring”). See also anal, annular, annelid. (Wiktionary)