| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024lith•i•um /ˈlɪθiəm/USA pronunciation n. [uncountable]- Chemistrya soft, silver-white metallic element, the lightest of all metals.
See -lith-. WordReference Random House Unabridged Dictionary of American English © 2024lith•i•um (lith′ē əm),USA pronunciation n. - Chemistrya soft, silver-white metallic element, the lightest of all metals, occurring combined in certain minerals. Symbol: Li;
at. wt.: 6.939;
at. no.: 3;
sp. gr.: 0.53 at 20°C. - Drugs[Pharm.]the substance in its carbonate or citrate form used in the treatment or prophylaxis of bipolar disorder or mania.
- Neo-Latin; see lith-, -ium
- 1810–20
Collins Concise English Dictionary © HarperCollins Publishers:: lithium /ˈlɪθɪəm/ n - a soft silvery element of the alkali metal series: the lightest known metal, used as an alloy hardener, as a reducing agent, and in batteries. Symbol: Li; atomic no: 3; atomic wt: 6.941; valency: 1; relative density: 0.534; melting pt: 180.6°C; boiling pt: 1342°C
Etymology: 19th Century: New Latin, from litho- + -ium |