The Collaborative International Dictionary
Virial
Virial \Vir"i*al\, n. [L. vis, viris, force.] (Physics) A certain function relating to a system of forces and their points of application, -- first used by Clausius in the investigation of problems in molecular physics.
Wiktionary
virial
Etymology 1 a. (context mechanics English) Of or pertaining to the interactive forces between molecules or particles n. (context mechanics English) Half of the product of the stress of attraction or repulsion with the distance between two particles. Etymology 2
a. (misspelling of viral English)