Lewis & Short

mercātor, ōris, m. [mercor], a trader, merchant, esp. a wholesale dealer (opp. to caupo, a retailer; class.).

  1. I. Lit.: venalicii mercatoresque, Cic. Or. 70, 232: multi ad eos mercatores ventitant, Caes. B. G. 4, 3.
  2. II. Transf.
    1. A. A dealer, speculator: non consules, sed mercatores provinciarum, Cic. post Red. in Sen. 4, 10.
      Rarely of a petty dealer: vilis sacci mercator olentis, Juv. 14, 269.
    2. B. A buyer, purchaser: signorum, Cic. Verr. 1, 20, 60: veneni, Juv. 13, 154.