Φφ ⟵ {\displaystyle \longleftarrow } 22 ⟶ {\displaystyle \longrightarrow } Ψψ Pronunciation IPA (key): /kaɪ/ Audio (US)(file) Noun Singular chi Plural chis Twenty second letter of Greek. Χχ. The Simple English Wikipedia has an article on: Chi Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads