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topaz 音標拼音: [t'op ,æz] n. 黃晶,黃玉,蜂雀 黃晶,黃玉,蜂雀 topaz n 1: a yellow quartz [ synonym: { topaz}, { false topaz}, { common topaz}] 2: a mineral ( fluosilicate of aluminum) that occurs in crystals of various colors and is used as a gemstone 3: a light brown the color of topaz [ synonym: { tan}, { topaz}] Topaz \ To" paz\, n. [ OE. topas, F. topaze, L. topazos, or topazion, a kind of precious stone, Gr. to` pazos, topa` zion; possibly akin to Skr. tap to glow ( cf. { Tepid}). According to some, the name is from Topazos, a small island in the Red Sea, where the Romans obtained a stone which they called by this name, but which is the chrysolite of the moderns.] 1. ( Min.) A mineral occurring in rhombic prisms, generally yellowish and pellucid, also colorless, and of greenesh, bluish, or brownish shades. It sometimes occurs massive and opaque. It is a fluosilicate of alumina, and is used as a gem. [ 1913 Webster] 2. ( Zool.) Either one of two species of large, brilliantly colored humming birds of the genus { Topaza} ({ Topaza pella} or { Topaza pyra}), of South America and the West Indies. [ 1913 Webster] Note: The two tail feathers next to the central ones are much longer that the rest, curved, and crossed. The Throat is metallic yellowish- green, with a tint like topaz in the center, the belly is bright crimson, the back bright red. Called also { topaz hummer}. [ 1913 Webster] { False topaz}. ( Min.) See the Note under { Quartz}. [ 1913 Webster] |
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