| exeresis | Synonym: excision. Origin: G. Exairesis, a taking out, fr. Haireo, to take, grasp (05 Mar 2000) |
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| exergonic | <chemistry> Describes a chemical reaction that releases energy in the form of heat, light, etc. (09 Oct 1997) |
| exertion | Expenditure of energy by skeletal muscles. Intensity of exertion may be measured by rate of oxygen consumption, heat produced, or heart rate. Perceived exertion, a psychological measure of exertion, is included. (12 Dec 1998) |
| exertional dyspnea | Excessive shortness of breath after exercise. (05 Mar 2000) |
| exertional hypoglycaemia | <biochemistry> A condition of low blood glucose that is precipitated by activity. Symptoms include weakness, nausea, sweating, and/or fainting with exertion. Origin: Gr. Glykys = sweet, haima = blood (27 Sep 1997) |
| exfetation | <medicine> Imperfect fetation in some organ exterior to the uterus; extra-uterine fetation. Origin: Pref. Ex- + fetation. Source: Websters Dictionary (01 Mar 1998) |
| exflagellation | The extrusion of rapidly waving flagellum-like microgametes from microgametocytes; in the case of human malaria parasites, this occurs in the blood meal taken by the proper anopheline vector within a few minutes after ingestion of the infected blood by the mosquito. Synonym: polymitus. (05 Mar 2000) |
| exfoliate | 1. <botany> Peeling off in thin layers, shreds, or plates, as the bark of some trees. 2. <dermatology> To shed cells from the skin or from mucous membranes. 3. <dentistry> To fall out, with development, the deciduous teeth exfoliate and permanent teeth erupt into the space. Origin: L. Exfoliatio (08 Jan 1998) |
| exfoliatin | <microbiology> Epidermolytic toxin produced by some strains of Staphylococcus aureus, causes detachment of outer layer of skin by disrupting desmosomes of the stratum granulosum. (11 Nov 1997) |
| exfoliatins | Protein exotoxins from staphylococcus aureus, phage type II, which cause epidermal necrolysis. They are proteins with a molecular weight of 26,000 to 32,000. They cause a condition variously called scaled skin, lyell or ritter syndrome, epidermal exfoliative disease, toxic epidermal necrolysis, etc. (12 Dec 1998) |
| exfoliation | <biology> A falling off in scales or layers. Origin: L. Exfoliatio (18 Nov 1997) |
| exfoliation of lens | Sheetlike separation of the capsule of the lens; it may occur if the eyes are exposed to intense heat. (05 Mar 2000) |
| exfoliation syndrome | <syndrome> The deposition of flaky, translucent fibrillar material most conspicuous on the anterior lens capsule and pupillary margin but also in both surfaces of the iris, the zonules, trabecular meshwork, ciliary body, corneal endothelium, and orbital blood vessels. It sometimes forms a membrane on the anterior iris surface. Exfoliation refers to the shedding of pigment by the iris. (12 Dec 1998) |
| exfoliative | Marked by exfoliation, desquamation, or profuse scaling. Origin: Mod. L. Exfoliativus (05 Mar 2000) |
| exfoliative dermatitis | Generalised exfoliation with scaling of the skin and usually with erythema (erythroderma); may be a drug reaction or associated with various benign dermatoses, lupus erythematosus, lymphomas, or of undetermined cause. Synonym: dermatitis exfoliativa, pityriasis rubra, Wilson's disease. (05 Mar 2000) |