Definition of tamoxifen
: an estrogen antagonist C26H29NO used in the form of its citrate especially to treat postmenopausal breast cancer
Recent Examples of tamoxifen from the Web
Those with estrogen-receptor-positive cancer, for example, often take tamoxifen after surgery to reduce the risk of recurrence.
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Origin and Etymology of tamoxifen
probably by recombination & alteration of trans-, oxy, and clomiphene
First Known Use: 1972See Words from the same year
Medical Definition of tamoxifen
: a selective estrogen receptor modulator that acts as an estrogen antagonist in breast tissue and is administered orally in the form of its citrate C26H29NO·C6H8O7 especially to treat breast cancer or reduce the risk of its development or reoccurrence—see nolvadex
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