Lewis & Short

ăsĭnārĭus, a, um, adj. [asinus],

  1. I. pertaining or belonging to an ass: mola, a millstone turned by an ass, Cato, R. R. 10, 4; 11, 4; so Vulg. Matt. 18, 6; ib. Marc. 9, 41.
  2. II. Subst.
    1. A. ăsĭnārĭus, ii, m., a keeper of asses, an ass-driver, Cato, R. R. 10, 1; 11, 1, Varr. R. R. 1, 18, 1.
    2. B. Ăsĭnārĭa, ae, f., the title of a comedy of Plautus.
      (That the Via Asinaria (Paul. ex Fest. s. v retricibus, p. 282 Müll.), a side branch of the Via Latina, and the Porta Asinaria, were named from asinus, since upon this street and through this gate asses brought vegetables, fruit, etc., to Rome, is justly questioned in Platner’s Gesch. d. Stadt Rom, p. 663, in opp. to Müll. Roms Camp. I. pp. 3 and 4.)