1. plural of theta, the eighth letter of the Greek alphabet (Θ, θ)
2. plural of theta, brain waves with a frequency of 4-8 Hz associated with light sleep and meditation
Usage: neuroscience
3. plural of theta, angular measurements or variables represented by the Greek letter theta
Usage: mathematics; physics

Examples

• The student practiced writing Greek thetas on the whiteboard.
• The researcher measured the thetas in the patient’s EEG during meditation.
• In trigonometry, we often use multiple thetas to represent different angles.
• The physics equation contained several thetas representing various angular positions.
• Brain activity showed increased thetas during the relaxation phase.
• The fraternity’s name included two thetas from the Greek alphabet.