| Noun | 1. | periwinkle plant derivative - an antineoplastic drug used to treat some forms of cancer antineoplastic, antineoplastic drug, cancer drug - any of several drugs that control or kill neoplastic cells; used in chemotherapy to kill cancer cells; all have unpleasant side effects that may include nausea and vomiting and hair loss and suppression of bone marrow function Velban, vinblastine - periwinkle plant derivative used as an antineoplastic drug (trade name Velban) that disrupts cell division Oncovin, vincristine - periwinkle plant derivative used as an antineoplastic drug (trade name Oncovin); used to treat cancer of the lymphatic system |