Lewis Short
prae-scisco, ĕre
* V. inch. a., to find out, or learn beforehand (not in Cic. or Caes.): animos volgi,Verg. G. 4, 70: exploratam fugam,Col. 9, 9, 4: adversos subitosque motus,Amm. 20, 6, 9.—With rel.-clause, Liv. 27, 35, 5.
Charlton T. Lewis, Charles Short, A Latin Dictionary