Lewis & Short

aspersĭo, ōnis, f. [aspergo], a sprinkling upon, a sprinkling.

  1. I. Lit.: aspersione aquae, Cic. Leg. 2, 10, 24; Macr. S. 3, 1: sanguinis aspersio, Vulg. Heb. 12, 24; ib. 1 Pet. 1, 2: pulveris, ib. 3 Reg. 20, 28.
    Of the laying on of colors: aspersio fortuita, Cic. Div. 1, 13, 23.
  2. II. Trop.: ut sint in aquam aspersionis, for a water of scattering, separation, Vulg. Num. 19, 9.