| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024cad•mi•um (kad′mē əm),USA pronunciation n. - Chemistrya white, ductile divalent metallic element resembling tin, used in plating and in making certain alloys. Symbol: Cd;
at. wt.: 112.41;
at. no.: 48;
sp. gr. 8.6 at 20°C.
- Greek Kadmeía gê Cadmean earth) + -ium -ium
- Neo-Latin, equivalent. to Latin cadm(īa) calamine (origin, originally Cadmēa terra
- 1815–25
Collins Concise English Dictionary © HarperCollins Publishers:: cadmium /ˈkædmɪəm/ n - a malleable ductile toxic bluish-white metallic element that occurs in association with zinc ores. It is used in electroplating, alloys, and as a neutron absorber in the control of nuclear fission. Symbol: Cd; atomic no: 48; atomic wt: 112.411; valency: 2; relative density: 8.65; melting pt: 321.1°C; boiling pt: 767°C
Etymology: 19th Century: from New Latin, from Latin cadmīa zinc ore, calamine, referring to the fact that both calamine and cadmium are found in the ore |