| diethylmalonylurea | (noun) a barbiturate used as a hypnotic | Synonyms: barbital, barbitone, diethylbarbituric acid, veronal |
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| diethylstilbesterol | (noun) synthetic nonsteroid with the properties of estrogen; formerly used to treat menstrual problems but was found to be associated with vaginal cancers in the daughters of women so treated during pregnancy | Synonyms: DES, stilbesterol |
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| diethylstilbestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilboestrol, stilbestrol, stilboestrol |
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| diethylstilboestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilbestrol, stilbestrol, stilboestrol |
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| eightieth | (noun) position 80 in a countable series of things | - |
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| fiftieth | (noun) position 50 in a countable series of things | - |
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| fortieth | (noun) position 40 in a countable series of things | - |
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| ninetieth | (noun) position 90 in a countable series of things | - |
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| seventieth | (noun) position 70 in a countable series of things | - |
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| sixtieth | (noun) one part in sixty equal parts | Synonyms: one-sixtieth |
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| (noun) position 60 in a countable series of things | - |
| thirtieth | (noun) position 30 in a countable series of things | - |
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| twentieth | (noun) position 20 in a countable series of things | - |
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