Lewis & Short

mĕrīdĭānus, a, um, adj. [meridies], of or belonging to mid-day, mid-day-.

  1. I. (Class.) Tempus, mid-day, noon, Cic. de Or. 3, 5, 17: sol, Plin. 12, 19, 42, § 86: somnus, id. Ep. 9, 40, 2; Lact. 2, 9, 9.
    Hence, as subst.: mĕ-rīdĭāni, sc. gladiatores, mid-day combatants, gladiators who fought at mid-day, Suet. Claud. 34.
    In abl. adv.: mĕrīdĭā-nō, sc. tempore, at mid-day, Plin. 2, 26, 25, § 96; 9, 8, 8, § 25.
  2. II. Transf., of or belonging to the south or south side, southern, southerly, meridional: ager spectat ad meridianam caeli partem, Varr. R. R. 1, 7, 1: pars orbis, opp. septentrionalis, id. ib. 1, 2, 4: plaga, Plin. 2, 11, 8, § 50; Lact. 2, 9: orbis, Plin. 13, 4, 9, § 42: circulus, the equator, Sen. Q. N. 5, 17: latus tabernaculi, Vulg. Exod. 26, 35.
    Subst.: mĕrīdĭānum, i, n., the south, Vell. 2, 126, 3; Vulg. Eccli. 34, 19; id. Act. 8, 26.—mĕrīdĭāna, ōrum, n., southern places or parts: in meridianis Indiae, Plin. 7, 2, 2, § 24.