Lewis & Short

ex-albesco, bŭi, 3, v. inch. n., to become white.

  1. I. Lit. (very rarely), Gell. 12, 1, 12.
    More freq.,
  2. II. Trop., to grow white, turn pale from fright, etc., Enn. ap. Cic. de Or. 3, 58, 218; and in Fin. 5, 11, 31; Cic. Ac. 2, 15, 48; id. de Or. 1, 26, 121.