Lewis & Short

curto, āvi, ātum, 1, v. a. [curtus],

  1. I. to shorten, diminish (not ante-Aug., and very rare): aliquid, Cels. 7, 9: radices, Pall. Feb. 10, 3.
  2. II. Trop., to diminish: rem, Pers. 6, 34; cf.: Quantulum enim summae curtabit quisque dierum, Hor. S. 2, 3, 124.