Lewis & Short

prae-căno, ĕre (perf. praececini), v. a.

  1. I. To foretell, predict, prophesy (post-class.; for the class. praecino), Tert. adv. Jud. 10; id. adv. Marc. 4, 40; Mamert. Genethl. 10 (al. praecinebant; v. praecino, II.).
  2. * II. To anticipate, i. e. prevent, destroy in advance the power of an enchantment: aiunt (viperam) praecanere, Plin. 29, 4, 21, § 69 dub. (perh. recanere, cf. id. 28, 2, 4, § 19).