LSJ
οἱ, a board of three officials at Athens whose duty it was to provide lamps, wicks, etc. at certain festivals, Eup. 205 ; οἰνόπτης τις, ὁ τὸν οἶνον ἐπιβλέπων Poll. 6.21, cf. IG2². 1357.23 ; later, winetasters, οἱ ἔμπειροι οἰνόπται Gp. 7.7.1. (Perh. lit.
wine-choosers, v. ἐπιόψομαι.)
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)