The Collaborative International Dictionary of English v.0.48:

Kodiak bear \Kodiak bear\ n.
   A large brown bear (Ursus middendorffi syn. Ursus arctos
   middendorffi) of coastal Alaska and British Columbia related
   to the grizzly bear; called also Kodiak bear.

   Syn: Alaskan brown bear, Kodiak, Ursus middendorffi, Ursus
        arctos middendorffi.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Ursus middendorffi
    n 1: brown bear of coastal Alaska and British Columbia [syn:
         Alaskan brown bear, Kodiak bear, Kodiak, Ursus
         middendorffi, Ursus arctos middendorffi]