n. 1.1 an antiviral drug, (C10H13N5O4) used in the treatment of AIDS. It has the generic name of zidovudine. an analog of thymidine, it inhibits the replication of the viral chromosome. Syn. -- AZT, zidovudine[ generic ], 3'-azido 3'-deoxythymidine, Retrovir[ Trademark ] [ WordNet 1.5 +PJC ]