WordReference Random House Unabridged Dictionary of American English © 2025
trond•hjem•ite
(tron′ye mīt′),USA pronunciation n. [Petrol.]
- Rocksa coarse-grained igneous rock composed of quartz, plagioclase feldspar, and a small amount of biotite.
- Trondhjem (now Trondheim) + -ite1