photonasty

noun

pho·​to·​nas·​ty

plural -es

: a nastic movement that is associated with changes in light intensity

Word History

Etymology

International Scientific Vocabulary phot- + -nasty; probably originally formed as German photonastie

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

Rhymes for photonasty

• dishonesty
• honesty