A form of tumour, caused by an RNA virus, which affects birds, particularly poultry.
- ‘The first tumor-causing virus identified in any organism was the Rous sarcoma virus in chickens.’
- ‘The doctor says I should rest up and be thankful that it wasn't Rous sarcoma virus - there's a nasty lot of it about at the moment.’
- ‘They started by studying the Rous sarcoma virus, named after Peyton Rous.’
Early 20th century: named after Francis P. Rous (1879–1970), American physician.