Lewis Short
per-frīgesco, frixi, 3
* V. inch. n.
* Lit., to grow very cold, to catch cold: ne canes perfrigescant,Varr. R. R. 2, 9, 13; Plin. 31, 6, 33, § 66: ei, qui perfrixit, opus est in laconico sedere, donec insudet,Cels. 1, 3: si perfrixit, cantat bene,Juv. 7, 194.
* Trop. (post-class.), M. Aur. ap. Front. Ep. ad M. Caes. 4, 5.
Charlton T. Lewis, Charles Short, A Latin Dictionary