Lewis & Short

prae-cŏquo, xi, ctum, 3, v. a.

  1. I. To boil beforehand, Plin. 18, 29, 69, § 288: rutam, Cael. Aur. Acut. 2, 34, 136; id. Tard. 4, 3, 26.
  2. II. To ripen fully: praecocta uva (sole), Plin. 14, 9, 11, § 81.