Definition of norovirus in English:
 norovirus
nounˈnɔːrəvʌɪrəsˈnɔrəˌvaɪrəs
Medicine 1Any of various single-stranded RNA viruses including the Norwalk virus and closely related viruses.
Genus Norovirus, family Caliciviridae
 Example sentencesExamples
-  Norovirus is the most common cause of infectious gastroenteritis in England and Wales.
 -  We are testing some samples and suspect it is norovirus, we should get lab confirmation early this week.
 -  "Real difficulties are caused when norovirus is introduced to closed environments such as hospitals, residential homes or schools."
 -  Nineteen people have submitted stool samples that tested positive for diarrhea-causing agents: Campylobacter (14), norovirus (3), salmonella (1) and Giardia (1).
 -  O'Connor noted that the norovirus has many different strains, making it difficult for a person to develop long-lasting immunity to the infection.
 
- 1.1mass noun Gastroenteritis caused by a norovirus.
 an outbreak of norovirus aboard the ship infected 350 passengers
 Example sentencesExamples
-  GPs' surgeries were packed with people suffering with symptoms of the norovirus.
 -  We know Norovirus is now quite widespread in the community.
 -  Winter vomiting disease, or norovirus, is a brief illness, which usually lasts for one to three days.
 -  The winter vomiting bug (also known as Norovirus) exhibits the symptoms of gastrointestinal illness and has affected some 16 patients.
 -  The norovirus is highly contagious, affecting up to one million people in the United Kingdom every year.
 
 
Origin
  
Early 21st century: from nor- in Norwalk virus + -o- + virus.
   Definition of norovirus in US English:
 norovirus
nounˈnôrəˌvīrəsˈnɔrəˌvaɪrəs
Medicine 1Any of various single-stranded RNA viruses including the Norwalk virus and closely related viruses.
Genus Norovirus, family Caliciviridae
 Example sentencesExamples
-  O'Connor noted that the norovirus has many different strains, making it difficult for a person to develop long-lasting immunity to the infection.
 -  Norovirus is the most common cause of infectious gastroenteritis in England and Wales.
 -  We are testing some samples and suspect it is norovirus, we should get lab confirmation early this week.
 -  "Real difficulties are caused when norovirus is introduced to closed environments such as hospitals, residential homes or schools."
 -  Nineteen people have submitted stool samples that tested positive for diarrhea-causing agents: Campylobacter (14), norovirus (3), salmonella (1) and Giardia (1).
 
- 1.1 Gastroenteritis caused by a norovirus.
 an outbreak of norovirus aboard the ship infected 350 passengers
 Example sentencesExamples
-  Winter vomiting disease, or norovirus, is a brief illness, which usually lasts for one to three days.
 -  The winter vomiting bug (also known as Norovirus) exhibits the symptoms of gastrointestinal illness and has affected some 16 patients.
 -  The norovirus is highly contagious, affecting up to one million people in the United Kingdom every year.
 -  GPs' surgeries were packed with people suffering with symptoms of the norovirus.
 -  We know Norovirus is now quite widespread in the community.
 
 
Origin
  
Early 21st century: from nor- in Norwalk virus + -o- + virus.