Definition of "tamoxifen" []

• 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. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The researchers showed that long-term tamoxifen use increases risk of an drug tamoxifen is a tried-and-true way to lower the chances of developing the most common type of recurrence among breast cancer survivors, but new research suggests it ... drug tamoxifen to reduce the risk of developing a second breast cancer."
• "In addition to Lupron, I take a daily pill called tamoxifen that is 100% harmful to a fetus."
• "She is also discussing with her doctor the possibility of taking a medication called tamoxifen, which has been shown to cut the chances of breast cancer in women with ADH."