Definition: Formerly a subfamily of viruses (family Retroviridae) that includes the foamy viruses (agents) of primates and other mammals; they are now placed in the genus Spumavirus. In common with other retroviruses, they possess RNA-dependent DNA polymerases (reverse transcriptase).
[L. spuma, foam]
Search Stedman's Medical Dictionary
Examples: glitazone, GI cocktail, etc.