Lewis & Short

pulvĕro, āre, v. n. and a. [id.].

  1. I. To scatter dust; to bestrew with dust, to dust: non (volo) hoc (vestibulum) pulveret (for pulveretur, should be full of dust, v. Gell. l. l.), Plaut. Fragm. ap. Gell. 18, 12, 4: se, Plin. 11, 33, 39, § 114.
    1. B. In partic., in vintagers’ lang., to cover the vines with dust, by digging up the soil (as a protection against the sun and mist): vineas, Col. 11, 2, 60: vites, Pall. 4, 7, 1; 7, 1, 2: uvas, Plin. 17, 9, 5, § 49.
  2. II. To reduce to powder, to pulverize: herbas, Calp. Ecl. 5, 88.