Medical Definition of polyomavirus
1 capitalized : the sole genus in a family (Polyomaviridae) of double-stranded DNA viruses that contain a single molecule of DNA, have a capsid composed of 72 capsomers, and induce tumors usually in specific mammals and that include simian virus 40 and the causative agent of progressive multifocal leukoencephalopathy
2: any of the genus Polyomavirus of double-stranded DNA viruses
Seen and Heard
What made you want to look up polyomavirus? Please tell us where you read or heard it (including the quote, if possible).