a synthetic estrogen, CHO, used as a substitute for natural estrogens: a probable carcinogen now banned by the FDA as a food supplement for fattening cattle: abbrev. DES
See diethylstilbestrol in American Heritage Dictionary 4
(dī-ĕthˌəl-stĭl-bĕsˈtrôlˌ, -trōlˌ)
noun
A synthetic nonsteroidal substance, C18H20O2, having estrogenic properties and used in the treatment of prostatic cancer. It was once used to treat menstrual disorders and to prevent miscarriage but is no longer prescribed for these cases because of the occurrence of reproductive abnormalities and cancers in the offspring of women so treated.