| estradiol | (noun) the most powerful female hormone that occurs naturally; synthesized and used to treat estrogen deficiency and breast cancer | Synonyms: oestradiol |
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| estragon | (noun) fresh leaves (or leaves preserved in vinegar) used as seasoning | Synonyms: tarragon |
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| (noun) aromatic perennial of southeastern Russia | Synonyms: Artemisia dracunculus, tarragon |
| estrangement | (noun) the feeling of being alienated from other people | Synonyms: alienation, disaffection |
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| (noun) separation resulting from hostility | Synonyms: alienation |
| estriol | (noun) a naturally occurring estrogenic hormone; a synthetic form is used to treat estrogen deficiency | Synonyms: oestriol |
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| estrogen | (noun) a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics | Synonyms: oestrogen |
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| estrone | (noun) a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency | Synonyms: Estronol, oestrone, theelin |
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| estrus | (noun) applies to nonhuman mammals: a state or period of heightened sexual arousal and activity | Synonyms: heat, oestrus, rut |
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