| metallo- | Metal, metallic. Origin: see metal (05 Mar 2000) |
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| metallochrome | A colouring produced by the deposition of some metallic compound; specifically, the prismatic tints produced by depositing a film of peroxide of lead on polished steel by electricity. See: Metallochromy. Source: Websters Dictionary (01 Mar 1998) |
| metallocyanide | A compound of cyanogen with a metal forming an ionic radical that combines with a basic element to form a salt; e.g., potassium ferricyanide, K3Fe(CN)6. (05 Mar 2000) |
| metalloenzyme | <enzyme> An enzyme that contains a bound metal ion as part of its structure. The metal may be required for enzymic activity, either participating directly in catalysis or stabilising the active conformation of the protein. (18 Nov 1997) |
| metalloflavodehydrogenase | A type of oxidizing enzyme, containing one of the flavin nucleotides as coenzyme, plus a metal ion that is also necessary to the action; the metal may be Fe (as in succinate dehydrogenase), Cu (as in urate oxidase), or Mo (as in xanthine oxidase). (05 Mar 2000) |
| metalloflavoenzyme | <enzyme> An enzyme that contains one of the flavin nucleotides and at least one metal ion as a required part of its active structure. (05 Mar 2000) |
| metalloflavoprotein | A protein containing a flavin entity and at least one metal ion. (05 Mar 2000) |
| metallograph | A print made by metallography. Origin: L. Metallum metal + -graph. Source: Websters Dictionary (01 Mar 1998) |
| metallographic | Pertaining to, or by means of, metallography. Source: Websters Dictionary (01 Mar 1998) |
| metallographist | One who writes on the subject of metals. Source: Websters Dictionary (01 Mar 1998) |
| metallography | 1. The science or art of metals and metal working; also, a treatise on metals. 2. A method of transferring impressions of the grain of wood to metallic surfaces by chemical action. 3. A substitute for lithography, in which metallic plates are used instead of stone. Origin: L. Metallum metal: cf. F. Metallographie. Source: Websters Dictionary (01 Mar 1998) |
| metalloid | Formerly, the metallic base of a fixed alkali, or alkaline earth; applied by Sir H. Davy to sodium, potassium, and some other metallic substances whose metallic character was supposed to be not well defined. Now, one of several elementary substances which in the free state are unlike metals, and whose compounds possess or produce acid, rather than basic, properties; a nonmetal; as, boron, carbon, phosphorus, nitrogen, oxygen, sulphur, chlorine, bromine, etc, are metalloids. Origin: L. Metallum metal: cf. F. Metalloide. Source: Websters Dictionary (01 Mar 1998) |
| metallophilia | Affinity for metal salts; e.g., the affinity of the cytoplasm of cells of the reticuloendothelial system for silver carbonate stain and salts of gold and iron. Origin: metallo-+ G. Philos, fond (05 Mar 2000) |
| metallophobia | <psychology> Morbid fear of metal objects. Origin: G. Metallon, metal, + phobos, fear (05 Mar 2000) |
| metalloporphyrin | A combination of a porphyrin with a metal, e.g., Fe (haematin), Mg (as in chlorophyll), Cu (in haemocyanin), Zn. (05 Mar 2000) |
| noble metal | A metal that cannot be oxidised by heat alone, nor readily dissolved by acid; e.g., gold, platinum. Synonym: noble element. (05 Mar 2000) |
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| d'Arcet's metal | An alloy of lead, bismuth, and tin; used in dentistry. (05 Mar 2000) |
| fusible metal | A metal with a low melting point. (05 Mar 2000) |
| light metal | A metal with a specific gravity of less than 4. (05 Mar 2000) |
| liquid metal | <radiobiology> Metal which has been heated past its melting point and can be used as a working fluid for pumping heat out from a powerplant. Liquid metal used as coolant in a system where significant magnetic fields exist, it behaves differently due to magnetohydrodynamic effects, these cause pressure which resists fluid circulation, suppression of turbulence, and altered flow patterns compared to non-magnetic liquid metal systems. (09 Oct 1997) |
| liquid-metal fast-breeder reactor | <physics> Fission breeder reactor concept using liquid-metal coolant and breeding additional fuel off fast neutrons. See: breeder reactor. (09 Oct 1997) |