Lewis & Short

grĕgālis, e, adj. [grex], of or belonging to the herd or flock.

  1. I. Lit.: equi, Varr. R. R. 2, 7, 6: equae, Plin. 10, 63, 83, § 181: pecua, App. M. 6, p. 182.
  2. II. Transf., in gen., belonging to the same host or multitude.
    1. A. In a good sense, subst.: grĕ-gāles, ĭum, m., comrades, companions: nos nihil sumus, gregalibus illis, quibus te plaudente vigebamus, amissis, Cic. Fam. 7, 33, 1; id. de Or. 2, 62, 253.
    2. B. In a bad sense, of the common sort, common (mostly post-Aug.): gregali sagulo amictus, i. e. a common soldier’s, Liv. 7, 34, 15: habitu, Tac. A. 1, 69: poma, Sen. Ben. 1, 12 fin.: siligo, Plin. 18, 9, 20, § 86: sulphur, Stat. S. 1, 6, 74: tectorium, Sen. Ep. 86.