[dahy-eth-uhl-stil-bes-trawl, -trol]
noun Pharmacology.
a nonsteroidal synthetic estrogen, C 18 H 20 O 2 , used in medicine chiefly in the treatment of menopausal symptoms and in animal feeds for chemical caponization: formerly used during pregnancy for the prevention of miscarriage but discontinued owing to its association with an increased risk of vaginal and cervical cancers in women having had fetal exposure. Abbreviation: DES
Also, diethylstilboestrol.

1935–40; di-1 + ethyl + stilbestrol Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
diethylstilbestrol or diethylstilboestrol (daɪˌɛθɪlstɪlˈbɛstrɒl, -ˌiːθaɪl-, daɪˌɛθɪlstɪlˈbɛstrɒl, -ˌiːθaɪl-)
stilbestrol, Also called: stilboestrol a synthetic hormone with oestrogenic properties, used to relieve menopausal symptoms. Formula: OHC6H4CH:CHC6H4OH
diethylstilboestrol or diethylstilboestrol

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

diethylstilbestrol di·eth·yl·stil·bes·trol (dī-ěth'əl-stĭl-bēs'trôl, -trōl)

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
diethylstilbestrol   (dī-ěth'əl-stĭl-běs'trôl', -trōl')  Pronunciation Key 
See DES.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica


nonsteroidal synthethic estrogen used as a drug and formerly used to promote growth of livestock. Unlike natural estrogens, DES remains active following oral administration. It is also administered as vaginal suppositories and by injection. DES breaks down more slowly in the body than do the natural estrogens.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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