Lewis & Short

būcĭnātor (bucc-), ōris, m. [bucino],

  1. I. one who blew the bucina, a trumpeter, Caes. B.C. 2, 35; Petr. 26, 9; Varr. L. L. 6, § 75; Dig. 50, 6, 6; Inscr. Orell. 3522.
  2. II. Trop. (cf. bucina, II. D.), one who trumpets forth, blazes abroad: bucinator existimationis meae, Cic. Fil. ap. Cic. Fam. 16, 21, 2; Inscr. Orell. 3232.