Lewis & Short

† armus, i, m., = ἁρμός [ἄρω; v. arma inct.], pr., a joining together; the shoulder where it is fitted to the shoulder-blade, the fore quarter (opp. suffrago), and, with few exceptions, of the shoulder of an animal, while umerus designates that of men.

  1. I. Lit.: solus homo bipes: uni juguli, umeri; ceteris armi, Plin. 11, 43, 98, § 243: digiti (Hippomenae in leonem mutati) curvantur in ungues: Ex umeris armi fiunt, Ov M. 10, 700.
    So, elephantis, Plin. 11, 40, 95, § 233: leonis, id. 11, 39, 94, § 229: pantherae, id. 8, 17, 23, § 62 et saep.: leporis, Hor S. 2, 4, 44; 2, 8, 89: equi, id. ib. 1, 6, 106: arietis, Vulg. Num. 6, 19; ib. Exod. 29, 27.
    Of men: latos huic hasta per armos Acta, Verg. A. 11, 644; Paul. ex Fest. s. v. armita, p. 4 Müll.
    And of the arms of men, Luc. 9, 831.
  2. * II. In a more extended sense, the whole side of an animal: spumantis equi fodere calcaribus armos, Verg. A. 6, 881; cf. Hor. S. 1, 6, 106.