ψεῖ Save ψεῖ, the letter ψ LSJ Grieks Nederlands ψεῖ, τό, name of the letter ψ, Hellad. ap. Phot. Bibl. p.530 B. ψεῖ, τό, ook ψῖ [~ πεῖ, πῖ] indecl., psi, zie Ψ, ψ.