Try Our Apps


Avoid these words. Seriously.


[tuh-mok-suh-fuh n, ‐fen] /təˈmɒk sə fən, ‐ˌfɛn/
noun, Pharmacology.
an antineoplastic drug, C 26 H 29 NO, that blocks the estrogen receptors on cancer cells, used in the treatment of breast cancer.
Origin of tamoxifen
1970-75; perhaps t(rans)- + am(ino)- + oxy-2 + phen(yl), with respelling of y and ph Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
British Dictionary definitions for tamoxifen


a drug that antagonizes the action of oestrogen and is used to treat breast cancer and some types of infertility in women
Word Origin
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
Cite This Source
tamoxifen in Science
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 © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for tamoxifen

Word Value for tamoxifen

Scrabble Words With Friends