| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024chro•mi•um /ˈkroʊmiəm/USA pronunciation n. [uncountable]- Chemistrya bright, shiny metal element used in making alloy steels.
- Automotive(not in technical use) chrome (def. 2).
WordReference Random House Unabridged Dictionary of American English © 2024chro•mi•um (krō′mē əm),USA pronunciation n. - Chemistrya lustrous, hard, brittle, metallic element used in alloy steels for hardness and corrosion resistance, as in stainless steel, and for plating other metals: chromium salts are used as pigments and mordants. Symbol: Cr;
at. wt.: 51.996;
at. no.: 24;
sp. gr.: 7.1. - chrome (def. 2).
Collins Concise English Dictionary © HarperCollins Publishers:: chromium /ˈkrəʊmɪəm/ n - a hard grey metallic element that takes a high polish, occurring principally in chromite: used in steel alloys and electroplating to increase hardness and corrosion-resistance. Symbol: Cr; atomic no: 24; atomic wt: 51.9961; valency: 2, 3, or 6; relative density: 7.18–7.20; melting pt: 1863±20°C; boiling pt: 2672°C
Etymology: 19th Century: from New Latin, from French: chrome |