ri·ba·vi·rin (rī'bə-vī'rĭn) n. A synthetic antiviral ribonucleoside, C8H12N4O5, that inhibits the replication of DNA and RNA, used to treat respiratory syncytial virus.
Main Entry: ri·ba·vi·rin Pronunciation: "rI-b&-'vI-r&n Function: noun : a synthetic broad-spectrum antiviral drugC8H12N4O5 that is a nucleoside resembling guanosine