ἡμι-ωβελιαῖος · hēmi-ōbeliaios — LSJ
costing, worth half an obol, as large as a half-obol
costing or worth half an obol, PCair.Zen. 19.5 (iii B.C.):—less correctly written ἡμι-ωβολιαῖος, κρέα Ar. Ra. 554; as large as a half-obol, X. Mem. 1.3.12. (-βελιαῖος shd. prob. be restored.)