Definition of Antineoplastic

Antineoplastic: Acting to prevent, inhibit or halt the development of a neoplasm (a tumor). An agent with antineoplastic properties. For example, oxaliplatin (Eloxatin) is an antineoplastic used in the treatment of metastatic colon cancer. The term is applicable to dozens of other chemotherapy agents used to treat this an other forms of cancer.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=22631
Last Editorial Review: 9/20/2012