Holmes light

noun

ˈhōmz- also -ōlmz-

variants or Holmes signal

: a signaling device that consisting of a case containing impure calcium phosphide and a float and that when thrown into water generates hydrogen phosphides that take fire spontaneously

Word History

Etymology

probably from the name Holmes

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