leptoclase

noun

lep·​to·​clase

ˈleptəˌklās,

-āz

plural -s

: a minute crack or fracture in rock

Word History

Etymology

International Scientific Vocabulary lept- + -clase; probably originally formed in French

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