| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024tung•sten /ˈtʌŋstən/USA pronunciation n. [uncountable]- Chemistrya rare, bright gray, metallic element having a high melting point, used in electric light bulbs.
WordReference Random House Unabridged Dictionary of American English © 2024tung•sten (tung′stən),USA pronunciation n. [Chem.]- Chemistrya rare, metallic element having a bright-gray color, a metallic luster, and a high melting point, 3410° C, and found in wolframite, tungstite, and other minerals: used in alloys of high-speed cutting tools, electric-lamp filaments, etc. Symbol: W; at. wt.: 183.85;
at. no.: 74;
sp. gr.: 19.3. Also called wolfram.
- Swedish, equivalent. to tung heavy + sten stone
- 1760–70
Collins Concise English Dictionary © HarperCollins Publishers:: tungsten /ˈtʌŋstən/ n - a hard malleable ductile greyish-white element. It occurs principally in wolframite and scheelite and is used in lamp filaments, electrical contact points, X-ray targets, and, alloyed with steel, in high-speed cutting tools. Symbol: W; atomic no: 74; atomic wt: 183.85; valency: 2–6; relative density: 19.3; melting pt: 3422±20°C; boiling pt: 5555°C
Also called: wolfram
Etymology: 18th Century: from Swedish tung heavy + sten stone |