The Collaborative International Dictionary of English v.0.48:

Halo \Ha"lo\, v. t. & i. [imp. & p. p. Haloed (-l[=o]d); p.
   pr. & vb. n. Haloing.]
   To form, or surround with, a halo; to encircle with, or as
   with, a halo.
   [1913 Webster]

         The fire
         That haloed round his saintly brow.      --Southey.
   [1913 Webster] halobacter