Grotthuss-Draper law

noun

Grott·​huss-Dra·​per law

ˈgrȯt|ˌhu̇s|ˈdrāpə(r)-,

ˈgrät|,

|ˌhüs|

: a statement in physical chemistry: radiation produces photochemical action only through absorption of its energy by the substance affected

Word History

Etymology

after Theodor von Grotthuss †1822 German physicist and John W. Draper †1882 American chemist

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