[ fley-tuh s ]
/ ˈfleɪ təs /

noun, plural fla·tus·es.

intestinal gas produced by bacterial action on waste matter in the intestines and composed primarily of hydrogen sulfide and varying amounts of methane.

Nearby words

  1. flattop,
  2. flatulate,
  3. flatulence,
  4. flatulent,
  5. flatulently,
  6. flatware,
  7. flatways,
  8. flatwise,
  9. flatwoods,
  10. flatwork

Origin of flatus

1660–70; < New Latin; Latin: a blowing, breathing, breath, equivalent to flā(re) to blow + -tus suffix of v. action

Also called gas.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for flatus

British Dictionary definitions for flatus


/ (ˈfleɪtəs) /

noun plural -tuses

gas generated in the alimentary canal

Word Origin for flatus

C17: from Latin: a blowing, snorting, from flāre to breathe, blow

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for flatus



1660s, from Latin flatus "a blowing," from flare "to blow" (see blow (v.1)).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for flatus


[ flātəs ]


Gas generated in or expelled from the digestive tract, especially from the stomach or intestines.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.