ἡ, gen. ὀσφύος ; acc. ὀσφῦν, also ὀσφύα AP 12.213 (Strat.) : — lion or loins, lower part of the back, Epich. 80, Hp. Aët. 20, Aph. 3.23, Arist. HA 493a22, al. ; opp. κῶλα, ὦμοι, A. Pr. 497, Hdt. 2.40; loin of a victim, SIG 57.9 (Milet., v BC), 1037.2 (iv/iii BC), Pherecr. 23.4, Ar. Pax 1053, Lys. 964, Men. 319.12; of wasps, ἔχουσι κέντρον ἐκ τῆς ὀ. Ar. V. 225, cf. 740 (anap.); of a horse, X. Eq. 1.12; of a fish, Antiph. 132.6 (anap.). Hellenist., metaph, ὁ καρπὸς τῆς ὀ., of a son, Act. Ap. 2.30, cf. LXX Ge. 35.11, al. περιζώννυσθαι or ἀναζώννυσθαι τὴν ὀσφύν gird up one΄s loins, ib. Je. 1.17; βυσσίνῳ ib. Da. 10.5, cf. Ev. Luc. 12.35. [υ in nom. and acc. sg., which are accented ὀσφῦς, ὀσφῦν by Hdn. Gr. 2.937; ὀσφύς, ύν freq. in codd., and this may be admitted for late writers; cf. ὀφρῦς.]

ὀσφύς, -ύος, ἡ
[in LXX chiefly for מֹתֶן;, also for חָלַץ, etc. ;]
the loin: Mat.3:4, Mrk.1:6; metaph., περιζώννυσθαι (ἀναζ-) τ. ὀσφύας, Luk.12:35, Eph.6:14, 1Pe.1:13; regarded, as by the Hebrews, as the seat of generative power, Heb.7:5, 10; metaph., καρπὸς τ. ὀσφύος, Act.2:30
(AS)