We found 12 dictionaries that define the word beta waves:

General (7 matching dictionaries)

1. beta waves: Merriam-Webster
2. beta waves: Oxford Learner's Dictionaries
3. beta waves: Collins English Dictionary
4. beta waves: Vocabulary.com
5. beta waves: Wiktionary
6. beta waves: Dictionary.com
7. beta waves: TheFreeDictionary.com

Business (1 matching dictionary)

8. beta waves: Legal dictionary

Computing (1 matching dictionary)

9. beta waves: Encyclopedia

Medicine (3 matching dictionaries)

10. beta waves: Merriam-Webster Medical Dictionary
11. Dorland's Illustrated Medical Dictionary (No longer online)
12. beta waves: Medical dictionary

(Note: See beta_wave as well.)

Definitions from Wiktionary (beta wave) ▸ noun:  (neurology) An electrical signal produced by the brain while the subject mentally active. ▸ Also see beta_wave Phrases: beta brain waves, more... ▸ Words similar to beta waves ▸ Usage examples for beta waves ▸ Idioms related to beta waves ▸ Wikipedia articles (New!) ▸ Words that often appear near beta waves ▸ Rhymes of beta waves ▸ Invented words related to beta waves