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theta US English

The eighth letter of the Greek alphabet (Θ, θ), transliterated as ‘th.’

Theta in theta US English

The eighth star in a constellation

θ in theta US English

Temperature (especially in degrees Celsius)

theta rhythm US English

Electrical activity observed in the brain under certain conditions, consisting of oscillations (theta waves) with a frequency of 4 to 7 hertz

theta waves in theta rhythm US English

Electrical activity observed in the brain under certain conditions, consisting of oscillations (theta waves) with a frequency of 4 to 7 hertz