virial

noun

vir·​i·​al

ˈvirēəl

plural -s

: half the product of the stress due to the attraction or repulsion between two particles in space times the distance between them or in the case of more than two particles half the sum of such products taken for the entire system

Word History

Etymology

German, from Latin vires, plural, strength, power + German -ial; akin to Latin vis strength, force, violence

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