tamoxifen
noun
ta·mox·i·fen
tə-ˈmäk-sə-ˌfen 
: an estrogen antagonist C26H29NO used in the form of its citrate especially to treat postmenopausal breast cancer
Examples of tamoxifen in a Sentence
Recent Examples on the Web
After a moment’s thought, Greenwald told her to do the lumpectomy—and the tamoxifen, which would cut the chance of cancer recurrence in half.
—
Melanie Thernstrom,
New Yorker,
29 June 2026
If the findings are confirmed, the risk score could help doctors tailor recommendations for surveillance intensity and risk-reduction strategies, including medications like tamoxifen or aromatase inhibitors, specifically for those high-risk women, says Roy.
—
Emily Kay Votruba,
EverydayHealth.com,
2 Oct. 2025
In general, though, the risk of uterine cancer from tamoxifen use is low.
—
Carrie Madormo,
Health,
13 July 2025
Thank you, Dora, on behalf of all the women tamoxifen has helped, and all the women tamoxifen will help.
—
Katie Hafner,
Scientific American,
31 Oct. 2024
See All Example Sentences for tamoxifen
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Melanie Thernstrom,
New Yorker,
29 June 2026
If the findings are confirmed, the risk score could help doctors tailor recommendations for surveillance intensity and risk-reduction strategies, including medications like tamoxifen or aromatase inhibitors, specifically for those high-risk women, says Roy.
—
Emily Kay Votruba,
EverydayHealth.com,
2 Oct. 2025
In general, though, the risk of uterine cancer from tamoxifen use is low.
—
Carrie Madormo,
Health,
13 July 2025
Thank you, Dora, on behalf of all the women tamoxifen has helped, and all the women tamoxifen will help.
—
Katie Hafner,
Scientific American,
31 Oct. 2024
See All Example Sentences for tamoxifen
Cite this Entry
“Tamoxifen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tamoxifen. Accessed 7 Jul. 2026.
Copy CitationMedical Definition
tamoxifen
noun
ta·mox·i·fen
ta-ˈmäk-si-ˌfen
: 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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