Meanings
nountheta rhythm (plural theta rhythms)
plural theta rhythms
- A type of electrical activity in the brain: brain waves with a frequency of 4-8 hertz.
Synonyms & antonyms
nounthe normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude
Similar
Broader
Also see
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
Cite this entry
APA
theta rhythm. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/theta%20rhythm
MLA
“theta rhythm.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/theta%20rhythm. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “theta rhythm,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/theta%20rhythm.
Source: theta rhythm on Wiktionary, CC BY-SA 4.0.