We found 15 dictionaries that define the word theta wave:

General (10 matching dictionaries)

1. theta wave: Merriam-Webster
2. theta wave: Vocabulary.com
3. theta wave: Wiktionary
4. theta wave: Infoplease Dictionary
5. theta wave: Dictionary.com
6. Theta wave: Wikipedia, the Free Encyclopedia
7. theta wave: Rhymezone
8. theta wave: FreeDictionary.org
9. theta wave: Mnemonic Dictionary
10. theta wave: TheFreeDictionary.com

Computing (1 matching dictionary)

11. theta wave: Encyclopedia

Medicine (3 matching dictionaries)

12. theta wave: Merriam-Webster Medical Dictionary
13. online medical dictionary (No longer online)
14. theta wave: Medical dictionary

Slang (1 matching dictionary)

15. theta wave: Urban Dictionary

(Note: See theta_waves as well.)

Definitions from Wiktionary (theta wave) ▸ noun:  A type of electrical activity in the brain; a brain wave with a frequency of 4-8 hertz. Similar: theta rhythm, T wave, P wave, pulse wave, waveform, T-wave, gravity wave, wave train, carrier wave, wave function, more... Opposite: alphwave, betwave, deltwave, gammwave ▸ Words similar to theta wave ▸ Usage examples for theta wave ▸ Idioms related to theta wave ▸ Wikipedia articles (New!) ▸ Words that often appear near theta wave ▸ Rhymes of theta wave ▸ Invented words related to theta wave