ὀμφᾰκ-ιον · omphak-ion — LSJ
juice of unripe grapes, Dsc. 5.5, Gal. 12.902 ; also, oil made from unripe olives, Hp. Acut.(Sp.) 65, Mul. 2.189, Plin. HN 12.130, PTeb. 273.33 (ii/iii A.D.).
= ὄμφαξ II.2, Aristaenet. 2.7 (τοῦ στέρνου μῆλα being prob. a gloss).