Lewis & Short

pulviscŭlus, i, m. (neutr. collat. form pulviscŭlum, i, Vigilant. ap. Hier. adv. Vigil. 4), dim. [pulvis].

  1. I. Lit., small dust, fine powder (ante- and post-class.), Sol. 15 fin.; App. M. 9, p. 222, 23; id. Mag. p. 277, 7: si abaco et pulvisculo te dedisses, i. e. the mathematical sciences (v. pulvis, I.), id. ib. p. 284, 1: pulvisculi flabiles, Arn. 2, 49.
  2. II. Transf.: cum pulvisculo, dust and all, i. e. wholly, completely, Plaut. Rud. 3, 6, 7; id. Truc. prol. 19.