pyrophoric alloy

noun

: an alloy (as ferrocerium) that has the property of emitting sparks when scratched or struck with steel and that is used in lighter flints

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