We found 18 dictionaries that define the word rest mass:

General (14 matching dictionaries)

1. rest mass: Merriam-Webster
2. rest mass: Oxford Learner's Dictionaries
3. rest mass: American Heritage Dictionary of the English Language
4. rest mass: Collins English Dictionary
5. rest mass: Vocabulary.com
6. rest mass: Wiktionary
7. rest mass: The Wordsmyth English Dictionary-Thesaurus
8. rest mass: Infoplease Dictionary
9. rest mass: Dictionary.com
10. Rest-mass, Rest mass: Wikipedia, the Free Encyclopedia
11. rest mass: Rhymezone
12. rest mass: FreeDictionary.org
13. rest mass: Mnemonic Dictionary
14. rest mass: TheFreeDictionary.com

Computing (1 matching dictionary)

15. rest mass: Encyclopedia

Medicine (1 matching dictionary)

16. rest mass: Medical dictionary

Science (1 matching dictionary)

17. Rest Mass: Eric Weisstein's World of Physics

Tech (1 matching dictionary)

18. Glossary of Meteorology (No longer online)

Definitions from Wiktionary (rest mass) ▸ noun:  (physics) The mass of a body when it is not moving relative to an observer. Similar: restmass, rest energy, inertial mass, equilibrium, passive gravitational mass, relativistic mass, mass, weight, gravitational mass, active gravitational mass, more... Opposite: relativistic mass, kinetic mass, energy mass Types: baryon, lepton, meson, gauge boson, graviton, Higgs boson, more... ▸ Words similar to rest mass ▸ Usage examples for rest mass ▸ Idioms related to rest mass ▸ Wikipedia articles (New!) ▸ Words that often appear near rest mass ▸ Rhymes of rest mass ▸ Invented words related to rest mass