ἀπφίδιον

τό
ἀπφίδιον [φι],τό, Sch.Luc. Cat. 12, and ἀπφίον, τό, Eust. 565.23, Dim. of ἀπφά; also ἀπφία Poll. 3.74, cf. Hsch.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project