Lewis & Short

lumbus, i, m., a loin.

  1. I. Lit.: At Edepol nos (velimus) tibi in lumbos linguam atque oculos in solum (decidisse), Plaut. Poen. 3, 1, 68: exporgi meliust lumbos, id. Ps. prol. 24 (1); id. Ep. Grex, 2: lumborum tenus, Cic. Arat. 82: usque ad lumbos, Quint. 11, 3, 131: nautaeque caput lumbosque saligno Fuste dolat, Hor. S. 1, 5, 22: aprugnus, Plin. 8, 57, 78, § 210; 20, 3, 8, § 14: magno premit populus agmine lumbos, Juv. 3, 244.
    As food: caprigeni lumbi, Macr. S. 2, 9, 12.
    Prov.: lumbis patris habere se putat digitos grossiores, said of those who regard themselves as superior to their forefathers (cf. 1 Kings, 12, 10), Hier. Ep. 82, n. 3.
  2. II. Transf.
    1. A. The genital organs, Pers. 1, 20; 4, 35; Juv. 9, 59.
      Hence, in eccl. Lat.: in lumbis patris, yet unborn, Vulg. Heb. 7, 10: reges de lumbis tuis egredientur, id. Gen. 35, 11.
    2. B. That part of a vine from which the branches spring, Col. Arbor. 3; Plin. 17, 23, 35, n. 26, § 210.