|
tungsten 音標拼音: [t'ʌŋstən] n. 鎢,鎢錳鐵礦,金屬元素 鎢,鎢錳鐵礦,金屬元素 tungsten n 1: a heavy grey- white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite [ synonym: { tungsten}, { wolfram}, { W}, { atomic number 74}] Tungsten \ Tung" sten\ ( t[ u^] ng" st[ e^] n), n. [ Sw. tungsten ( cf. Dan. tungsteen, G. tungstein); tung heavy ( akin to Dan. tung, Icel. [ thorn] ungr) sten stone. See { Stone}.] 1. ( Chem.) A rare element of the chromium group found in certain minerals, as wolfram and scheelite, and isolated as a heavy steel- gray metal which is very hard and infusible. It has both acid and basic properties. When alloyed in small quantities with steel, it greatly increases its hardness. Symbol W ( Wolframium). Atomic weight, 183. 6. Specific gravity, 18. [ 1913 Webster] 2. ( Min.) Scheelite, or calcium tungstate. [ Obs.] [ 1913 Webster] { Tungsten ocher}, or { Tungstic ocher} ( Min.), tungstite. [ 1913 Webster]
|
安裝中文字典英文字典查詢工具!
中文字典英文字典工具:
英文字典中文字典相關資料:
|