Lewis & Short

algesco, alsi, 3, v. inch. n. [algeo].

  1. I. To catch cold: ne ille alserit, Ter. Ad. 1, 1, 11 (cf.: frigus colligere, Hor. Ep. 1, 11, 13, and perfrigescere, Juv. 7, 194).
      1. 2. Post-Aug. (cf. algens) of things, to become cold: (vites) aegrotant et, cum alsere, laesis uredine attonsarum oculis, Plin. 17, 24, 37, § 226: rabies flammarum, Prud. Apoth. 142.