What does gastroenteritis mean?
Gastroenteritis is the medical name for inflammation of the stomach and intestines, most often caused by infection. It commonly produces nausea, vomiting, diarrhea, and abdominal cramps, and severe cases can cause dehydration. The expression “stomach flu” is a familiar nickname, although influenza does not cause the condition. In medical and public-health contexts, the term is used for individual illnesses and clusters of cases, including outbreaks traced to contaminated food or water. Accurate diagnosis matters because causes and treatment can differ; for example, antibiotics are not useful against a viral infection. Most cases resolve with hydration and time, but symptoms can be severe in infants, older adults, and immunocompromised people. Knowing the term helps distinguish this digestive illness from gastritis, which affects only the stomach. The word combines Greek roots for “stomach” and “intestine” with a suffix meaning “inflammation,” making it a precise and memorable label for a common clinical condition.
nounInflammation of the stomach and intestines, usually caused by infection and commonly producing vomiting, diarrhea, and abdominal cramps.
- Inflammation of the stomach and intestines, usually associated with infection and accompanied by symptoms such as nausea, vomiting, diarrhea, abdominal cramps, and sometimes fever.
"The clinic reported a small outbreak of viral gastroenteritis among students at the school."
"After two days of severe cramps and diarrhea, she was diagnosed with acute gastroenteritis."
"Health officials advised visitors to avoid the affected beach after several cases of gastroenteritis were reported."
The plural is rare in general prose; speakers usually refer to multiple cases or episodes of gastroenteritis instead.
"Several severe gastroenteritides required hospital treatment."
Its nickname, “stomach flu,” describes the symptoms neatly, but influenza is not the cause.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does gastroenteritis come from?
The word was formed in the early 19th century from Greek roots meaning “stomach” and “intestine,” together with the suffix “-itis,” meaning inflammation. Its components are also reflected in related medical terms such as gastritis and enteritis. The combining form “gastro-” remains widely used in words concerning the stomach.
Related word forms
How gastroenteritis is actually used
This is the standard medical term, while “stomach flu” is its familiar informal alternative. The nickname can suggest influenza but does not imply it: gastroenteritis is usually caused by other infectious agents. Its use is not restricted to formal medical writing, and regional pronunciation varies slightly.
Easily confused with gastroenteritis
Gastroenteritis affects both the stomach and intestines, whereas gastritis is inflammation confined primarily to the stomach lining.