petalite

noun

pet·​al·​ite

-ˌīt

plural -s

: a usually white mineral LiAl(Si₂O₅)₂ consisting of a lithium aluminum silicate occurring in foliated cleavable masses or in monoclinic crystals (hardness 6–6.5, specific gravity 2.39–2.46)

Word History

Etymology

German petalit, from Greek petalon leaf + German -it -ite

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now