Lewis Short
nundĭnātor (noun M) : id.
* A trader, trafficker.
* Lit., Paul. ex Fest. s. v. nundinae, p. 173 Müll.: NVNDINATOR, an appellation of Mercury as the patron deity of brokers, Inscr. Rein. cl. 1, n. 80.
* Trop.: nundinator salutis publicae, Ps.-Quint. Decl. 12, 3.
Charlton T. Lewis, Charles Short, A Latin Dictionary