The Collaborative International Dictionary of English v.0.48:

Gloriole \Glo"ri*ole\, n. [L. gloriola a small glory, dim. of
   gloria glory.]
   An aureole. [R.] --Msr. Browning.
   [1913 Webster]

WordNet (r) 3.0 (2006):

gloriole
    n 1: an indication of radiant light drawn around the head of a
         saint [syn: aura, aureole, halo, nimbus, glory,
         gloriole]