Lewis & Short

pŏlītĭo, ōnis, f. [1. polio], a smoothing, a furbishing, polishing.

  1. I. Lit. (post-Aug.): speculi, Vitr. 7, 3.
    Of smoothing or plastering a wall, Vitr. 7, 4.
  2. II. Transf., an improving, cultivating: agrorum, Cato, R. R. 136.