| Du Bois-Reymond's law | A motor nerve responds, not to the absolute value, but to the alteration of value from moment to moment, of the electric current; i.e., rate of change of intensity of the current is a factor in determining its effectiveness. Synonym: Du Bois-Reymond's law. (05 Mar 2000) |
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| Du Bois-Reymond, Emil | <person> German physiologist, 1818-1896. See: Du Bois-Reymond's law. (05 Mar 2000) |
| dual leucine zipper bearing kinase | <enzyme> A serine/threonine kinase but hybrid between microtubule-associated protein kinase kinase kinases and the fibroblast growth factor receptor family; genbank u14636; do not confuse with the neoplasm protein dlk Registry number: EC 2.7.10.- Synonym: dlk kinase (26 Jun 1999) |
| dual personality | A mental disturbance in which a person assumes alternately two different identities without either personality being consciously aware of the other. See: multiple personality. (05 Mar 2000) |
| dual recognition hypothesis | An outmoded hypothesis that is known to be incorrect now that the structure of the T-cell receptor is known. The proposal was that viral (and some chemical) antigens were recognised in association with histocompatibility antigens by separate receptors on the T-cell. The generation of cytotoxic T-cells was by association with Class I MHC antigens, of T helper cells by association with Class II MHC antigens. See: altered self hypothesis. (18 Nov 1997) |
| dual relationships | Relationships in which a health service provider is concurrently participating in two or more role categories with a patient; such dual relationships may be benign (as when both are members of the same social group) or exploitive (a sexual relationship). (05 Mar 2000) |
| dual-cure resin | A resin which utilises both light and chemical initiation to activate polymerization. (05 Mar 2000) |
| dualin | <chemistry> An explosive substance consisting essentially of sawdust or wood pulp, saturated with nitroglycerin and other similar nitro compounds. It is inferior to dynamite, and is more liable to explosion. Source: Websters Dictionary (01 Mar 1998) |
| dualism | <physiology> State of being dual or twofold; a twofold division; any system which is founded on a double principle, or a twofold distinction; as: The theory that each cerebral hemisphere acts independently of the other. "An inevitable dualism bisects nature, so that each thing is a half, and suggests another thing to make it whole." (Emerson) Origin: Cf. F. Dualisme. Source: Websters Dictionary (01 Mar 1998) |
| dualistic | Consisting of two; pertaining to dualism or duality. <chemistry> Dualistic system or theory, the theory, originated by Lavoisier and developed by Berzelius, that all definite compounds are binary in their nature, and consist of two distinct constituents, themselves simple or complex, and possessed of opposite chemical or electrical affinities. Source: Websters Dictionary (01 Mar 1998) |
| duan | A division of a poem corresponding to a canto; a poem or song. Origin: Gael. & Ir. Source: Websters Dictionary (01 Mar 1998) |
| Duane | Alexander, U.S. Ophthalmologist, 1858-1926. See: Duane's syndrome. (05 Mar 2000) |
| duane's syndrome | <syndrome> A hereditary congenital syndrome in which the affected eye shows limitation or absence of abduction, restriction of adduction, retraction of the globe on adduction, narrowing of the palpebral fissure on adduction and widening on adduction, and deficient convergence. It is transmitted as an autosomal trait. (12 Dec 1998) |
| dub | 1. To confer knight. The conclusion of the ceremony was marked by a tap on the shoulder with the sword. 2. To invest with any dignity or new character; to entitle; to call. "A man of wealth is dubbed a man of worth." (Pope) 3. To clothe or invest; to ornament; to adorn. "His diadem was dropped down Dubbed with stones." (Morte d'Arthure) 4. To strike, rub, or dress smooth; to dab; as: To dress with an adz; as, to dub a stick of timber smooth. To strike cloth with teasels to raise a nap. To rub or dress with grease, as leather in the process of cyrrying it. To prepare for fighting, as a gamecock, by trimming the hackles and cutting off the comb and wattles. To dub a fly, to dress a fishing fly. To dub out, to fill out, as an uneven surface, to a plane, or to carry out a series of small projections. Origin: AS. Dubban to strike, beat ("dubbade his sunu . . . To ridere." AS. Chron. An 1086); akin to Icel. Dubba; cf. OF. Adouber (prob. Fr. Icel) a chevalier, Icel. Dubba til riddara. Source: Websters Dictionary (01 Mar 1998) |
| dubb | <zoology> The Syrian bear. See Bear. Alternative forms: dhubb, and dub. Origin: Ar. Source: Websters Dictionary (01 Mar 1998) |