| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024xe•non /ˈzinɑn, ˈzɛnɑn/USA pronunciation n. [uncountable]- Chemistrya heavy, colorless, chemically inactive, gaslike element used for filling radio and television tubes.
WordReference Random House Unabridged Dictionary of American English © 2024xe•non (zē′non, zen′on),USA pronunciation n. [Chem.]- Chemistrya heavy, colorless, chemically inactive, monatomic gaseous element used for filling radio, television, and luminescent tubes. Symbol: Xe;
at. wt.: 131.30;
at. no.: 54.
- Greek xénon, neuter of xénos strange (see -on2); name introduced by William Ramsay, the element's discoverer
- 1898
Collins Concise English Dictionary © HarperCollins Publishers:: xenon /ˈzɛnɒn/ n - a colourless odourless gaseous element occurring in trace amounts in air; formerly considered inert it is now known to form compounds and is used in radio valves, stroboscopic and bactericidal lamps, and bubble chambers. Symbol: Xe; atomic no: 54; atomic wt: 131.29; valency: 0; density: 5.887 kg/m³; melting pt: –111.76°C; boiling pt: –108.0°C
Etymology: 19th Century: from Greek: something strange |