| dim | 1. Not bright or distinct; wanting luminousness or clearness; obscure in luster or sound; dusky; darkish; obscure; indistinct; overcast; tarnished. "The dim magnificence of poetry." (Whewell) "How is the gold become dim!" (Lam. Iv. 1) "I never saw The heavens so dim by day." (Shak) "Three sleepless nights I passed in sounding on, Through words and things, a dim and perilous way." (Wordsworth) 2. Of obscure vision; not seeing clearly; hence, dull of apprehension; of weak perception; obtuse. "Mine eye also is dim by reason of sorrow." (Job xvii. 7) "The understanding is dim." (Rogers) Obvious compounds: dim-eyed; dim-sighted, etc. Synonym: Obscure, dusky, dark, mysterious, imperfect, dull, sullied, tarnished. Origin: AS. Dim; akin to OFries. Dim, Icel. Dimmr: cf. MHG. Timmer, timber; of uncertain origin. 1. To render dim, obscure, or dark; to make less bright or distinct; to take away the luster of; to darken; to dull; to obscure; to eclipse. "A king among his courtiers, who dims all his attendants." (Dryden) "Now set the sun, and twilight dimmed the ways." (Cowper) 2. To deprive of distinct vision; to hinder from seeing clearly, either by dazzling or clouding the eyes; to darken the senses or understanding of. "Her starry eyes were dimmed with streaming tears." (C. Pitt) Origin: Dimmed; Dimming. Source: Websters Dictionary (01 Mar 1998) |
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| dimaprit | <chemical> Carbamimidothioic acid 3-(dimethylamino)propyl ester. A histamine h2 receptor agonist that is often used to study the activity of histamine and its receptors. Pharmacological action: histamine agonist. Chemical name: Carbamimidothioic acid, 3-(dimethylamino)propyl ester (12 Dec 1998) |
| dimazole dihydrochloride | 6-(2-diethylaminoethoxy)-2-dimethylaminobenzothiazole dihydrochloride;an antifungal agent for topical use. Synonym: dimazole dihydrochloride. (05 Mar 2000) |
| dimazon | 4-o-Tolylazo-o-diacetotoluide;an azo compound occurring in red crystals; used with petrolatum as an ointment to stimulate epithelial cell proliferation and thus promote the healing of superficial wounds. (05 Mar 2000) |
| dimelia | Congenital duplication of the whole or a part of a limb. Origin: G. Di-, two, + melos, limb (05 Mar 2000) |
| dimenhydrinate | <chemical> A drug combination that contains diphenhydramine and theophylline. It is used for treating vertigo, motion sickness, and nausea associated with pregnancy. It is not effective in the treatment of nausea associated with cancer chemotherapy. Pharmacological action: antiemetics, histamine h1 antagonists. Chemical name: 1H-Purine-2,6-dione, 8-chloro-3,7-dihydro-1,3-dimethyl-, compd. With 2-(diphenylmethoxy)-N,N-dimethylethanamine (1:1) (12 Dec 1998) |
| dimension | 1. Measure in a single line, as length, breadth, height, thickness, or circumference; extension; measurement; usually, in the plural, measure in length and breadth, or in length, breadth, and thickness; extent; size; as, the dimensions of a room, or of a ship; the dimensions of a farm, of a kingdom. "Gentlemen of more than ordinary dimensions." (W. Irving) Space of dimension, extension that has length but no breadth or thickness; a straight or curved line. Space of two dimensions, extension which has length and breadth, but no thickness; a plane or curved surface. Space of three dimensions, extension which has length, breadth, and thickness; a solid. Space of four dimensions, as imaginary kind of extension, which is assumed to have length, breadth, thickness, and also a fourth imaginary dimension. Space of five or six, or more dimensions is also sometimes assumed in mathematics. 2. Extent; reach; scope; importance; as, a project of large dimensions. 3. <mathematics> The degree of manifoldness of a quantity; as, time is quantity having one dimension; volume has three dimensions, relative to extension. 4. <mathematics> A literal factor, as numbered in characterising a term. The term dimensions forms with the cardinal numbers a phrase equivalent to degree with the ordinal; thus, a^2b^2c is a term of five dimensions, or of the fifth degree. 5. <physics> The manifoldness with which the fundamental units of time, length, and mass are involved in determining the units of other physical quantities. Thus, since the unit of velocity varies directly as the unit of length and inversely as the unit of time, the dimensions of velocity are said to be length <divby/ time; the dimensions of work are mass <times/ (length)^2 <divby/ (time)^2; the dimensions of density are mass <divby/ (length)^3. Dimension lumber, Dimension scantling, or Dimension stock, lumber for building, etc, cut to the sizes usually in demand, or to special sizes as ordered. Dimension stone, stone delivered from the quarry rough, but brought to such sizes as are requisite for cutting to dimensions given. Origin: L. Dimensio, fr. Dimensus, p. P. Of dimetiri to measure out; di- = dis- + metiri to measure: cf. F. Dimension. See Measure. Source: Websters Dictionary (01 Mar 1998) |
| dimensional stability | The property of a material to retain its size and form. (05 Mar 2000) |
| dimer | A molecule which consists of two similar (but not necessarily identical) subunits. The term could also be used as a verb referring to the act of the two subunits coming together (to dimerize). (09 Oct 1997) |
| dimera | <zoology> A division of Coleoptera, having two joints to the tarsi. A division of the Hemiptera, including the aphids. Origin: NL, fr. Gr. = twice + part. Source: Websters Dictionary (01 Mar 1998) |
| dimeran | <zoology> One of the Dimera. Source: Websters Dictionary (01 Mar 1998) |
| dimercaprol | <chemical> 2,3-dimercapto-1-propanol. An anti-gas warfare agent that is effective against lewisite (dichloro(2-chlorovinyl)arsine). It acts as a chelating agent and is used in the treatment of arsenic, gold, and other heavy metal poisoning. Pharmacological action: antidotes, chelating agents. Chemical name: 1-Propanol, 2,3-dimercapto- (12 Dec 1998) |
| dimercurion | The mercuric ion, Hg2+. (05 Mar 2000) |
| dimeric | Having the characteristics of a dimer. (05 Mar 2000) |
| dimerization | The process by which two molecules of the same chemical composition form a condensation product or polymer. (12 Dec 1998) |