Definition of theta in Spanish:

theta

nombre femenino

Nombre de la octava letra del alfabeto griego; se escribe Θ/θ: la theta es una consonante que se transcribe como la ‘z’ latina.

Definition of theta in:

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Word of the day jaunty
Pronunciation: ˈjôntē
adjective
having a lively, cheerful, and self-confident manner...