The Collaborative International Dictionary of English v.0.48:

Brindled \Brin"dled\, a. [A dim. form of brinded.]
   Having dark streaks or spots on a gray or tawny ground;
   brinded. "With a brindled lion played." --Churchill.
   [1913 Webster]

WordNet (r) 3.0 (2006):

brindled
    adj 1: having a grey or brown streak or a pattern or a patchy
           coloring; used especially of the patterned fur of cats
           [syn: brindled, brindle, brinded, tabby]