| oestradiol | A hormone (272 D) synthesised mainly in the ovary, but also in the placenta, testis and possibly adrenal cortex. A potent oestrogen. (18 Nov 1997) |
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| oestrian | <zoology> Of or pertaining to the gadflies. A gadfly. Source: Websters Dictionary (01 Mar 1998) |
| oestrids | Common name for botflies of the family Oestridae, such as Oestrus. Origin: G. Oistros, gadfly (05 Mar 2000) |
| oestriol | <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) |
| oestrogen | <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) |
| oestrogen antagonist | <pharmacology> A drug or compound which inhibit or antagonise the action or biosynthesis of oestrogen. Tamoxifen also has agonist or stimulatory actions as well as blocking effects. There are also selective oestrogen-receptor modulators (SERMs). For example, raloxifene (trade name Evista) is classified as a SERM because it prevents bone loss (like oestrogen) and lowers serum cholesterol (like oestrogen) but (unlike oestrogen) does not stimulate the endometrial lining of the uterus. (12 May 2002) |
| oestrogen receptor | <cell biology> Cytoplasmic proteins that bind oestrogens and migrate to the nucleus where they regulate DNA transcription. Evaluation of the state of oestrogen receptors in breast cancer patients has become clinically important and determines the likelihood of response to anti-oestrogen therapy with tamoxifen. (17 Jul 2002) |
| oestrogen replacement therapy | <endocrinology, gynaecology> The use of oestrogenic substances in postmenopausal or other oestrogen-deficient women to alleviate effects of hormone deficiency, such as vasomotor symptoms, dyspareunia, and progressive development of osteoporosis. (12 Dec 1998) |
| oestrogenic | 1. Causing estrus in animals. 2. Having an action similar to that of an oestrogen. (05 Mar 2000) |
| oestrogenic hormone | <pharmacology> A female hormone produced by the ovaries (or an equivalent hormone synthesised in the laboratory). Oestrogen deficiency can lead to osteoporosis. (12 Dec 1998) |
| oestrogenism | <veterinary> A mycotoxic disease of pigs associated with eating moldy feeds containing the fungus Fusarium graminearum; the causative toxin is zeralenone, which produces a form of vulvovaginitis. (05 Mar 2000) |
| oestrogens | A class of sex hormones associated with the development and maintenance of secondary female sex characteristics and control of the cyclical changes in the reproductive cycle. They are also required for pregnancy maintenance and have an anabolic effect on protein metabolism and water retention. (12 Dec 1998) |
| oestrogens, catechol | 2- or 4-hydroxyoestrogens. Substances that are physiologically active in mammals, especially in the control of gonadotropin secretion. Physiological activity can be ascribed to either an oestrogenic action or interaction with the catecholaminergic system. (12 Dec 1998) |
| oestrogens, conjugated | An amorphous preparation containing water-soluble, conjugated forms of mixed oestrogens obtained from urine of pregnant mares. The principal oestrogen present is sodium estrone sulfate. The total oestrogenic potency of the preparation is expressed in terms of an equivalent quantity of sodium estrone sulfate. (12 Dec 1998) |
| oestrogens, synthetic | Compounds obtained by chemical synthesis which possess oestrogenic activity, but differ in structure from naturally occurring oestrogens. (12 Dec 1998) |
| oestrogen |
estrogen: a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics
Ãâó: wordnet.princeton.edu/perl/webwn
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| oestrus |
estrus: applies to nonhuman mammals: a state or period of heightened sexual arousal and activity type genus of the Oestridae: sheep botflies
Ãâó: wordnet.princeton.edu/perl/webwn
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| Oestrus ovis |
sheep botfly: larvae are parasitic on sheep
Ãâó: wordnet.princeton.edu/perl/webwn
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| Oestridae |
warble flies
Ãâó: wordnet.princeton.edu/perl/webwn
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| oestrogen |
The generic term for a group of female sex hormones which control the development of sexual characteristics and control oestrus.
Ãâó: www.fao.org/docrep/003/X3910E/X3910E18.htm
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| oestr | the most powerful female hormone that occurs naturally |
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| oestr | warble flies |
| oestr | a naturally occurring estrogenic hormone |
| oestr | a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics |
| oestr | a naturally occurring weak estrogenic hormone secreted by the mammalian ovary |
| oestr | type genus of the Oestridae: sheep botflies |
| oestr | applies to nonhuman mammals: a state or period of heightened sexual arousal and activity |
| oestr | larvae are parasitic on sheep |
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