WordReference Random House Unabridged Dictionary of American English © 2026
teph•rite
(tef′rīt),USA pronunciation n. [Petrog.]
teph•rit•ic
(tef rit′ik),USA pronunciation adj.
- Rocksa basaltic rock consisting essentially of pyroxene and plagioclase with nepheline or leucite.
- Greek tephr(ós) ash-colored + -ite1
- 1875–80;