Liddell–Scott–Jones: Ψ 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 soundχ(

A. kh): with the valuepsit is found in SIG 1 (Nubia,vi B. C.), etc.: as a numberal,ψ́ =

700 , but y'

=

700 , 000 .