/teuh mok"seuh feuhn, -fen'/ , n. Pharm.
an antineoplastic drug, C 26 H 29 NO, that blocks the estrogen receptors on cancer cells, used in the treatment of breast cancer.
[ 1970-75; perh. T(RANS)- + AM(INO)- + OXY- 2 + PHEN(YL), with resp. of y and ph ]