A.hollow between ribs and hip, flank, Od.22.295, Poll.2.166, etc.; “νείατον ἐς κενεῶνα, ὅθι ζωννύσκετο μίτρῃ” Il.5.857, cf. Hp.Prog.8 (pl.); of horses, X.Eq.12.8; of dogs, Id.Cyn. 4.1.
II. any hollow, hence periphr. “οὐράνιοι” AP9.207; αἰθέριος, χθόνιος κ., Nonn.D.13.453, 9.82; κενεὼν ἀρούρης ib.41.3; vacant space in a crowd, LXX 2 Ma.14.44.