ψ

Ψ ψ, ψεῖ (q. v.), τό, indecl., twenty-third letter of the Ionic alphabet, Pl. Cra. 427a, Callias ap. Ath. 10.453d: not used in the Attic alphabet: in the Western Gr. alphabets it represents the sound χ (kh): with the value ps it is found in SIG 1 (Nubia, vi B. C.), etc.: as a numeral, ψʹ = 700, but ͵ψ = 700,000.

ψ

• Ψ, ψ, ψῖ, τό, indecl., twenty-third letter of the Gr. alphabet: as a numeral, ψʹ 700, but ͵ψ 700, 000.— The letter ψ is a double Consonant, compounded of the labial π or φ with ς, πς, φς: the character ψ, ascribed to Simonides, was adopted at Athens in the archonship of Euclides (Ol. 94. 2) at the same time with η, ω, ξ.