| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024tour•ma•line (tŏŏr′mə lin, -lēn′),USA pronunciation n. - any of a group of silicate minerals of complex composition, containing boron, aluminum, etc., usually black but having various colored, transparent varieties used as gems.
Also, tour•ma•lin(tŏŏr′mə lin)USA pronunciation, turmaline.- Sinhalese tōramalliya carnelian; see -in2
- German Turmalin, ultimately
- 1750–60; earlier tourmalin
Collins Concise English Dictionary © HarperCollins Publishers:: tourmaline /ˈtʊəməˌliːn/ n - any of a group of hard glassy minerals of variable colour consisting of complex borosilicates of aluminium with quantities of lithium, sodium, calcium, potassium, iron, and magnesium in hexagonal crystalline form: used in optical and electrical equipment and in jewellery
Etymology: 18th Century: from German Turmalin, from Sinhalese toramalli carnelian |