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flatus

fla·tus/ˈfleɪtəs/noun

flatus is a noun meaning “Gas generated in the digestive tract” (English Wiktionary, September 2026). It is spelled F-L-A-T-U-S and has 2 syllables (fla·tus), and it appears about once in every 34 million words in written English (wordfreq, 2021 data). The plural of flatus is flatuses.

What does flatus mean?

noun

  1. 1

    Gas generated in the digestive tract.

    This expression is utterly devoid of meaning, a mere flatus vocis.

  2. 2

    The expulsion of such gas through the anus.

  3. 3

    obsoleteMorbid inflation or swelling.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

How do you pronounce flatus?

  • US /ˈfleɪtəs/
  • /ˈflætəs/

Flatus has 2 syllables, split fla·tus in writing.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-flatus.wav, Wikimedia Commons (author and licence on each file's page).

Forms of flatus

  • flatuses plural

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

How common is flatus?

Flatus appears about once in every 34 million words in written English, the 178,202nd most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

Flatus in Spanish, French, German and Portuguese

LanguageWords
Portugueseflato (gas generated in the digestive tract)
Spanishflato (gas generated in the digestive tract), ventosidad (expulsion of such gas through the anus)

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.

Where does flatus come from?

Learned borrowing from Latin flātus (“blowing, wind, fart”). First attested in the 1660s–1670s.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).