flatus
C2Formal, technical, medical, euphemistic
Definition
Meaning
Gas generated in the stomach or intestines and expelled through the anus.
The act or sound of expelling such gas; flatulence. In rare technical contexts, can refer to a puff of wind or breath.
Linguistics
Semantic Notes
A formal, often clinical or euphemistic term for what is commonly called 'fart' or 'gas'. It refers to both the substance (the gas) and the event of its expulsion. It is a countable noun (flatuses).
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning. Slightly more likely to be encountered in formal British medical writing, but equally rare in everyday speech in both regions.
Connotations
In both varieties, it carries strong connotations of medical or scientific formality. Using it in casual conversation would sound deliberately technical, humorous, or pretentious.
Frequency
Extremely low frequency in general discourse in both UK and US. Used almost exclusively in medical, physiological, or formal legal contexts (e.g., patient notes).
Vocabulary
Collocations
Grammar
Valency Patterns
to pass flatusto have flatusto suffer from flatusthe flatus of [e.g., the patient]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[No common idioms. The word itself is too technical.]”
Usage
Context Usage
Business
Virtually never used.
Academic
Used in medical, biological, and physiological research papers and textbooks.
Everyday
Extremely rare. Would be used humorously or to sound overly clinical.
Technical
Standard term in medical diagnostics, patient histories, and gastroenterology.
Examples
By Part of Speech
verb
British English
- The patient finds it difficult to pass flatus post-operatively.
American English
- The medication can help you to more easily pass flatus.
adverb
British English
- [No adverb form.]
American English
- [No adverb form.]
adjective
British English
- [No common adjective form. Use 'flatulent'.]
American English
- [No common adjective form. Use 'flatulent'.]
Examples
By CEFR Level
- [Too advanced for A2. Not introduced.]
- [Too advanced for B1. Not introduced.]
- The doctor asked if he was experiencing any pain or excess flatus.
- Some foods are known to cause increased flatus.
- A primary symptom of the condition is the involuntary passage of flatus.
- The study measured the volume and composition of intestinal flatus in subjects.
Learning
Memory Aids
Mnemonic
Think of 'FLATulence' + 'gAS' = FLATus. It's the formal, Latinate version of the common word.
Conceptual Metaphor
GAS AS PRESSURE / WIND
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'flat' (квартира).
- The Russian медицинский эквивалент 'газы' or 'метеоризм' is more common; 'flatus' is the specific clinical term.
- Avoid using it as a direct translation for the informal 'пердеть' – it is not a verb.
Common Mistakes
- Using it as a verb (e.g., 'He flatused'). The verb is 'to pass flatus'.
- Pronouncing it as /ˈflætəs/ (like 'flat'). Correct is /ˈfleɪtəs/ (like 'flay').
- Using it in casual conversation where 'gas' or 'wind' would be natural.
Practice
Quiz
In which context is the word 'flatus' MOST appropriately used?
FAQ
Frequently Asked Questions
It is not impolite, but it is highly clinical. In everyday situations, it would sound oddly formal or deliberately technical. Words like 'gas' or 'wind' are more natural euphemisms.
No, 'flatus' is only a noun. The action is described with phrases like 'to pass flatus' or 'to have flatus'. The related verb is 'to flatulate', though this is also very clinical.
They are often used interchangeably. However, 'flatus' more specifically refers to the gas itself or an instance of its expulsion, while 'flatulence' often refers to the condition of having excess gas or the process of expelling it.
It is a direct borrowing from Latin, preserved almost exclusively in medical terminology. Everyday English uses simpler, Germanic-based words (gas, wind) or slang for this bodily function.