Dictionary.com

tamoxifen

[ tuh-mok-suh-fuhn, ‐fen ]
/ təˈmɒk sə fən, ‐ˌfɛn /
Save This Word!

noun Pharmacology.
an antineoplastic drug, C26H29NO, that blocks the estrogen receptors on cancer cells, used in the treatment of breast cancer.
QUIZ
FIRE UP YOUR VOCAB FOR A "RED" SYNONYMS QUIZ
No fire engine reds here, only a fierce collection of vibrant words for the color red to test yourself on.
Question 1 of 7
What does "amaranth" mean?
Meet Grammar CoachWrite or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing
Meet Grammar CoachImprove Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of tamoxifen

1970–75; perhaps t(rans)- + am(ino)- + oxy-2 + phen(yl), with respelling of y and ph
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for tamoxifen

tamoxifen
/ (təˈmɒksɪfɛn) /

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 for tamoxifen

C20: altered from t (rans-) + am (ine) + oxy- ² + phen (ol)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for tamoxifen

tamoxifen
[ tə-mŏksə-fĕn ]

n.
A nonsteroidal estrogen antagonist used in the treatment of advanced breast cancer in women whose tumors are estrogen-dependent and also used prophylactically by some women at risk for breast cancer.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for tamoxifen

tamoxifen
[ tə-mŏksə-fĕn ]

An estrogen antagonist drug used to treat advanced breast cancer in women whose tumors are estrogen-dependent and to prevent breast cancer in some women who are at high risk.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
FEEDBACK