Medical Definition of bevacizumab
: an anticancer drug that is a genetically engineered monoclonal antibody administered intravenously to slow or inhibit tumor growth especially in some metastatic forms of cancer (such as colorectal cancer) ◆Bevacizumab acts by binding to and inhibiting the activity of vascular endothelial growth factor, a protein that promotes the growth of new blood vessels which supply a spreading tumor. It is marketed under the trademark Avastin.
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