Ηη ⟵ {\displaystyle \longleftarrow } 8 ⟶ {\displaystyle \longrightarrow } Ιι Pronunciation (UK) IPA (key): /ˈθiːtə/ (US) IPA (key): /ˈθeɪtə/ Audio (US)(file) Noun Singular theta Plural thetas Eighth letter of Greek. Θθ. The Simple English Wikipedia has an article on: Theta Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads