norovirus
noun
nor·o·virus
ˈnȯr-ə-ˌvī-rəs 
: any of a genus (Norovirus) of small, round, single-stranded RNA viruses that includes a single species (species Norwalk virus) with various strains causing gastroenteritis in people and animals (such as cows, pigs, and dogs)
People spread the virus by eating food or drinking liquids that are contaminated with norovirus, touching surfaces or objects contaminated with norovirus and then touching their mouth or having direct contact with another person who is infected.—
Cherie Black
Cherie BlackNote: In people, noroviruses cause gastroenteritis marked chiefly by sudden onset diarrhea, vomiting, nausea, and abdominal cramps.
see norwalk virusExamples of norovirus in a Sentence
Recent Examples on the Web
About one in 15 Americans will get norovirus annually, and one out of 160 children will be hospitalized.
—Melissa Rudy, FOXNews.com, 3 Apr. 2025
According to the federal health agency, every year the norovirus causes between 19 and 21 million illnesses, 109,000 hospitalizations and 900 deaths.
—Leah Sarnoff, ABC News, 1 Apr. 2025
People close to the situation have told The Times’ Jack Harris that Betts had the norovirus.
—Houston Mitchell, Los Angeles Times, 27 Mar. 2025
For one, there aren't a lot of good laboratory models and animal systems to run norovirus experiments or test candidate drugs.
—Ars Technica, 6 Mar. 2025
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Melissa Rudy, FOXNews.com, 3 Apr. 2025
According to the federal health agency, every year the norovirus causes between 19 and 21 million illnesses, 109,000 hospitalizations and 900 deaths.
—Leah Sarnoff, ABC News, 1 Apr. 2025
People close to the situation have told The Times’ Jack Harris that Betts had the norovirus.
—Houston Mitchell, Los Angeles Times, 27 Mar. 2025
For one, there aren't a lot of good laboratory models and animal systems to run norovirus experiments or test candidate drugs.
—Ars Technica, 6 Mar. 2025
See All Example Sentences for norovirus
Cite this Entry
“Norovirus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/norovirus. Accessed 18 Apr. 2025.
Copy CitationMedical Definition
norovirus
noun
nor·o·virus
ˌnȯr-ō-ˈvī-rəs
1
capitalized
: a genus of small, round, single-stranded, highly infectious RNA viruses that includes a single species (species Norwalk virus) with various strains causing gastroenteritis in people and animals (such as cows and dogs)
2
: any virus of the genus Norovirus
People spread the virus by eating food or drinking liquids that are contaminated with norovirus, touching surfaces or objects contaminated with norovirus and then touching their mouth or having direct contact with another person who is infected.—Cherie Black, The Seattle Post-Intelligencer
Cherie Black, The Seattle Post-IntelligencerNote: In people, noroviruses cause gastroenteritis marked chiefly by sudden onset, diarrhea, vomiting, nausea, and abdominal cramps.
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