We found 16 dictionaries that define the word elementary particles:

General (8 matching dictionaries)

1. elementary particles: Merriam-Webster
2. elementary particles: Collins English Dictionary
3. elementary particles: Vocabulary.com
4. elementary particles: Cambridge Advanced Learner's Dictionary
5. elementary particles: Wiktionary
6. elementary particles: Dictionary.com
7. Elementary particles: Wikipedia, the Free Encyclopedia
8. Elementary particles: TheFreeDictionary.com

Business (1 matching dictionary)

9. Elementary particles: Legal dictionary

Computing (1 matching dictionary)

10. elementary particles, particles, elementary: Encyclopedia

Medicine (4 matching dictionaries)

11. elementary particles: Merriam-Webster Medical Dictionary
12. Medical Dictionary (No longer online)
13. online medical dictionary (No longer online)
14. Elementary particles: Medical dictionary

Science (1 matching dictionary)

15. Accelerator Glossary (No longer online)

Tech (1 matching dictionary)

16. Explosives (No longer online)

(Note: See elementary_particle as well.)

Definitions from Wiktionary (elementary particle) ▸ noun:  (physics) A fundamental particle; any of the subatomic particles that do not consist of other, smaller particles; the gauge bosons, leptons and quarks. ▸ Also see elementary_particle Opposite: composite particles, hadrons Phrases: elementary particles of mitochondria, more... ▸ Words similar to elementary particles ▸ Usage examples for elementary particles ▸ Idioms related to elementary particles ▸ Wikipedia articles (New!) ▸ Words that often appear near elementary particles ▸ Rhymes of elementary particles ▸ Invented words related to elementary particles