Definition of "antiestrogen" [antiestrogen]

• A substance that blocks the production or utilization of estrogens, or inhibits their effects. (noun)

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• "BUY NOLVADEX: Nolvadex belongs to the group of sex hormones and is a so-called antiestrogen"
• "Those women whose tumors were positive were more likely to respond to antiestrogen drugs such as tamoxifen."
• "In their dogged pursuit of cures for menopause and for new contraceptive agents using synthetic estrogens, pharmaceutical companies had long abandoned the development of an antiestrogen, and there was no interest in developing an antiestrogen for cancer."