We found 20 dictionaries that define the word beta ray:

General (14 matching dictionaries)

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

Computing (1 matching dictionary)

15. beta ray: Encyclopedia

Medicine (3 matching dictionaries)

16. beta ray: Merriam-Webster Medical Dictionary
17. online medical dictionary (No longer online)
18. beta ray: Medical dictionary

Science (1 matching dictionary)

19. Beta Ray: Eric Weisstein's World of Physics

Tech (1 matching dictionary)

20. Glossary of Meteorology (No longer online)

(Note: See beta_rays as well.)

Definitions from Wiktionary (beta ray) ▸ noun:  A stream of beta particles (fast-moving electrons propagating through a gas or vacuum), such as emitted by a radioactive substance. Similar: beta radiation, electron radiation, beta, beta-beam, beta decay, alpha ray, beta particle, β-particle, betabeam, delta ray, more... Opposite: alphray, gammray, X-ray Types: positron, electron, more... Phrases: Beta Ray Bill, more... ▸ Words similar to beta ray ▸ Usage examples for beta ray ▸ Idioms related to beta ray ▸ Wikipedia articles (New!) ▸ Words that often appear near beta ray ▸ Rhymes of beta ray ▸ Invented words related to beta ray