| estrenes | Unsaturated derivatives of the estranes with methyl groups at carbon-13, with no carbon at carbon-10, and with no more than one carbon at carbon-17. They must contain one or more double bonds. (12 Dec 1998) |
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| estrepe | To strip or lay bare, as land of wood, houses, etc.; to commit waste. Origin: OF. Estreper. Source: Websters Dictionary (01 Mar 1998) |
| estrepement | A destructive kind of waste, committed by a tenant for life, in lands, woods, or houses. Origin: OF, damage, waste. Source: Websters Dictionary (01 Mar 1998) |
| estrin | <endocrinology, hormone> A generic term for oestrus producing steroid compounds, the female sex hormones. In humans, oestrogen is formed in the ovary, possibly the adrenal cortex, the testis and the foetoplacental unit, it has various functions in both sexes. It is responsible for the development of the female secondary sex characteristics and during the menstrual cycle it acts on the female genitalia to produce an environment suitable for the fertilization, implantation and nutrition of the early embryo. Oestrogen is used in oral contraceptives and as a palliative in cancer of the breast after menopause and cancer of the prostate, other uses include the relief of the discomforts of menopause, inhibition of lactation and treatment of osteoporosis, threatened abortion and various functional ovarian disorders. (18 Nov 1997) |
| estriol | <chemical> (16 alpha,17 beta)-estra-1,3,5(10)-triene-3,16,17-triol. A metabolite of estradiol and usually the predominant oestrogenic metabolite in urine. During pregnancy, large amounts of estriol are produced by the placenta. It has also been obtained from plant sources. The 16 beta-isomer has also been isolated from the urine of pregnant women. Chemical name: Estra-1,3,5(10)-triene-3,16,17-triol, (16alpha,17beta)- (12 Dec 1998) |
| estrodienol | <chemical> 4,4'-(1,2-diethylidene-1,2-ethanediyl)bisphenol. A synthetic, non-steroidal oestrogen structurally related to stilbestrol. It is used, usually as the cream, in the treatment of menopausal and postmenopausal symptoms. Pharmacological action: oestrogens, non-steroidal. Chemical name: Phenol, 4,4'-(1,2-diethylidene-1,2-ethanediyl)bis- (12 Dec 1998) |
| estrogen | <endocrinology, hormone> A generic term for oestrus producing steroid compounds, the female sex hormones. In humans, oestrogen is formed in the ovary, possibly the adrenal cortex, the testis and the foetoplacental unit, it has various functions in both sexes. It is responsible for the development of the female secondary sex characteristics and during the menstrual cycle it acts on the female genitalia to produce an environment suitable for the fertilization, implantation and nutrition of the early embryo. Oestrogen is used in oral contraceptives and as a palliative in cancer of the breast after menopause and cancer of the prostate, other uses include the relief of the discomforts of menopause, inhibition of lactation and treatment of osteoporosis, threatened abortion and various functional ovarian disorders. (18 Nov 1997) |
| estrogen 2-hydroxylase | <enzyme> Same enzyme for hydroxylation in 2 or 4 position Registry number: EC 1.14.99.- Synonym: estrogen 4-hydroxylase, ethinylestradiol 2-hydroxylase (26 Jun 1999) |
| estrone | <chemical> 3-hydroxyestra-1,3,5(10)-trien-17-one. A metabolite of estradiol but possessing less biological activity. It is found in the urine of pregnant women and mares, in the human placenta, and in the urine of bulls and stallions. According to the fourth annual report on carcinogens (ntp 85-002, 1985), estrone may reasonably be anticipated to be a carcinogen (merck, 11th ed). Chemical name: Estra-1,3,5(10)-trien-17-one, 3-hydroxy- (12 Dec 1998) |
| estrone reductase | <enzyme> Enzyme from porcine endometrium catalyses NADPH-dependent reduction of estrone to estradiol; is not the reverse reaction for estradiol dehydrogenase from this source Registry number: EC 1.1.1.- (26 Jun 1999) |
| estrone unit | The oestrogenic activity of 0.1 ug (0.0001 mg) of a standard preparation of crystalline estrone. (05 Mar 2000) |
| estrous | Pertaining to estrus. Synonym: estrual. (05 Mar 2000) |
| estrous cycle | The series of physiologic uterine, ovarian, and other changes that occur in higher animals, consisting of proestrus, estrus, postestrus, and anestrus or diestrus. (05 Mar 2000) |
| estrual | Pertaining to estrus. Synonym: estrual. (05 Mar 2000) |
| estrus | That portion or phase of the sexual cycle of female animals characterised by willingness to permit coitus; readily detectable behavioural and other signs are exhibited by animals during this period. Synonym: heat. Origin: G. Oistros, mad desire (05 Mar 2000) |