Definition: A genus of viruses (family Papovaviridae) containing DNA (MW 3 × 106), having virions about 45 nm in diameter, and including viruses oncogenic for animals; includes the polyoma virus of rodents, vacuolating viruses (SV40) of primates, and the BK and JC viruses of humans.
[poly- + G. -oma, tumor]
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Examples: glitazone, GI cocktail, etc.