lacmoid

noun

lac·​moid

variants or less commonly lackmoid

ˈlakˌmȯid

plural -s

: a violet-blue dye resembling litmus that is made by the action of nitrites on resorcinol and is used as an indicator in titration

Word History

Etymology

lacmoid, International Scientific Vocabulary lacm- (from lacmus) + -oid; probably originally formed as German lakmoid; lackmoid, alteration of lacmoid

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