| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024ter•bi•um (tûr′bē əm),USA pronunciation n. [Chem.]- Chemistrya rare-earth, metallic element present in certain minerals and yielding colorless salts. Symbol: Tb;
at. no.: 65;
at. wt.: 158.924;
sp. gr.: 8.25.
- (Yt)terb(y), name of Swedish town where found + -ium. See ytterbium 1835–45
Collins Concise English Dictionary © HarperCollins Publishers:: terbium /ˈtɜːbɪəm/ n - a soft malleable silvery-grey element of the lanthanide series of metals, occurring in gadolinite and monazite and used in lasers and for doping solid-state devices. Symbol: Tb; atomic no: 65; atomic wt: 158.92534; valency: 3 or 4; relative density: 8.230; melting pt: 1356°C; boiling pt: 3230°C
Etymology: 19th Century: from New Latin, named after Ytterby, Sweden, village where it was discoveredˈterbic adj |