| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024bis•muth /ˈbɪzməθ/USA pronunciation n. [uncountable]- Chemistryan easily broken, grayish white metallic element used in the manufacture of alloys and in medicine.
WordReference Random House Unabridged Dictionary of American English © 2024bis•muth (biz′məth),USA pronunciation n. [Chem.]- Chemistrya brittle, grayish-white, red-tinged, metallic element used in the manufacture of fusible alloys and in medicine. Symbol: Bi;
at. wt.: 208.980;
at. no.: 83.
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- Neo-Latin bisemūtum, Latinized form of German Wissmuth (now Wismut)
- earlier bismutum 1660–70
Collins Concise English Dictionary © HarperCollins Publishers:: bismuth /ˈbɪzməθ/ n - a brittle pinkish-white crystalline metallic element having low thermal and electrical conductivity, which expands on cooling. It is widely used in alloys, esp low-melting alloys in fire safety devices; its compounds are used in medicines. Symbol: Bi; atomic no: 83; atomic wt: 208.98037; valency: 3 or 5; relative density: 9.747; melting pt: 271.4°C; boiling pt: 1564±5°C
Etymology: 17th Century: from New Latin bisemūtum, from German Wismut, of unknown origin |