Liddell–Scott–Jones: κόππα

κόππα,τό,=Hebr. <*> (Koph), a letter (<*>) standing betweenπandρin early Greek alphabets, IG 14.2420 , etc.; later displaced byκ, but surviving in Latin as Q and retained in Greek as a numeral=

90 , e.g. PSI 8.958.24

(iv A. D.): prov.,

A.

οὐδὲ κόππα γιγνώσκων

Parmeno 1

.