| rare earth metal | Those elements with atomic numbers 57-71 which closely resemble one another chemically and were once difficult to separate from one another. Synonym: rare earth elements. Origin: Lanthanum, first element of the series (05 Mar 2000) |
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| central metal ion | <chemistry> The metal ion to which the ligands are attached at the centre of a coordination complex. (09 Oct 1997) |
| void metal composite | A porous metal structure that enables tissue growth within the openings to establish long-term attachment between prosthesis and tissue. (05 Mar 2000) |
| respiratory metal | A metal present in certain respiratory pigments; e.g., iron, manganese, copper, vanadium. (05 Mar 2000) |
| ceramo-metal casting | A casting made of alloys containing or excluding precious metals, to which dental porcelain can be fused. (05 Mar 2000) |
| metal | 1. <chemistry> An elementary substance, as sodium, calcium, or copper, whose oxide or hydroxide has basic rather than acid properties, as contrasted with the nonmetals, or metalloids. No sharp line can be drawn between the metals and nonmetals, and certain elements partake of both acid and basic qualities, as chromium, manganese, bismuth, etc. Popularly, the name is applied to certain hard, fusible metals, as gold, silver, copper, iron, tin, lead, zinc, nickel, etc, and also to the mixed metals, or metallic alloys, as brass, bronze, steel, bell metal, etc. 2. Ore from which a metal is derived; so called by miners. 3. A mine from which ores are taken. "Slaves . . . And persons condemned to metals." (Jer. Taylor) 4. The substance of which anything is made; material; hence, constitutional disposition; character; temper. "Not till God make men of some other metal than earth." (Shak) 5. Courage; spirit; mettle. See Mettle. The allusion is to the temper of the metal of a sword blade. 6. The broken stone used in macadamizing roads and ballasting railroads. 7. The effective power or calibre of guns carried by a vessel of war. 8. Glass in a state of fusion. 9. The rails of a railroad. <mathematics> Base metal, an alloy resembling brass, consisting of three parts of copper to one of zinc; also called Prince Rupert's metal. Origin: F. Metal, L. Metallum metal, mine, Gr. Mine; cf. Gr. To search after. Cf. Mettle, Medal. Source: Websters Dictionary (01 Mar 1998) |
| metal base | A metallic portion of a denture base forming a part of the wall of the basal surface of the denture; it serves as a base for the attachment of the plastic (resin) part of the denture and the teeth. (05 Mar 2000) |
| metal ceramic alloys | The fusion of ceramics (porcelain) to an alloy of two or more metals for use in restorative and prosthodontic dentistry. Examples of metal alloys employed include cobalt-chromium, gold-palladium, gold-platinum-palladium, and nickel-based alloys. (12 Dec 1998) |
| metal fume fever | An occupational disease, characterised by malaria-like symptoms, due to inhalation of particles and fumes of metallic oxides. Fumes are formed by evaporation at very high temperature and condensation in air into fine particles. Synonym: brass founder's ague, foundryman's fever, metal fume fever, zinc fume fever. (05 Mar 2000) |
| metal insert teeth | Prosthetic teeth containing metal cutting surfaces in the occlusal surfaces. (05 Mar 2000) |
| metal interface | In dentistry, a boundary between metal and nonsolvent solder, or between metal and surface oxide. (05 Mar 2000) |
| colloidal metal | A colloidal solution of a metal obtained by passing electric sparks between terminals of the metal in distilled water. Synonym: electrosol. (05 Mar 2000) |
| wood's metal | A fusible alloy consisting of one or two parts of cadmium, two parts of tin, four of lead, with seven or eight part of bismuth. It melts at from 66 deg to 71 deg C. See Fusible metal, under Fusible. Source: Websters Dictionary (01 Mar 1998) |
| heavy metal | A metal with a high specific gravity, typically larger than 5; e.g., Fe, Co, Cu, Mn, Mo, Zn, V. (05 Mar 2000) |
| heavy metal neuropathy | Peripheral nervous system disorders attributed to intoxication of one of the heavy metals: arsenic, gold, lead, mercury, platinum and thallium. (05 Mar 2000) |