semustineListen to pronunciation(seh-MUS-teen)A substance that has been studied in the treatment of some types of cancer. Semustine damages the cell’s DNA and may kill cancer cells. It is a type of alkylating agent and a type of nitrosourea.Search NCI's Dictionary of Cancer TermsStarts withContainsBrowse:ABCDEFGHIJKLMNOPQRSTUVWXYZ#