Tamoxifen is a drug that is used for treating women who have breast cancer.
tamoxifen in British English
(təˈmɒksɪˌfɛn)
noun
a drug that antagonizes the action of oestrogen and is used to treat breast cancer and some types of infertility in women
Word origin
C20: altered from t(rans-) + am(ine) + oxy-2 + phen(ol)
tamoxifen in American English
(təˈmɑksəˌfɛn)
noun
a synthetic hormone, C32H37NO10, used as an estrogen-blocking drug to inhibit the growth of certain types of tumors, esp. in cases of advanced breast cancer