WordReference Random House Unabridged Dictionary of American English © 2026
pet•al•ite
(pet′l īt′),USA pronunciation n.
- Mineralogya mineral, lithium aluminum silicate, Li(AlSi4O10), occurring in colorless or white foliated masses: an important source of lithium.
- German Petalit. See petal, -ite1
- 1800–10