Lewis & Short

trĕcēnārĭus ( TERCENARIVS, Inscr. Grut. 387, 8; 417, 5), a, um, adj. num. [treceni].

  1. I. Of or belonging to three hundred: vites, i. e. that yield three hundred amphorae of wine to the juger, Varr. R. R. 1, 2, 7.
  2. II. A soldier whose pay is three hundred sestertia (cf. ducenarius), Inscr. Grut. 365, 6; 387, 8; 417, 5.