The Collaborative International Dictionary of English v.0.48:

Bannock \Ban"nock\, n. [Gael. bonnach.]
   A kind of cake or bread, in shape flat and roundish, commonly
   made of oatmeal or barley meal and baked on an iron plate, or
   griddle; -- used in Scotland and the northern counties of
   England. --Jamieson.
   [1913 Webster]

   Bannock fluke, the turbot. [Scot.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

bannock
    n 1: a flat bread made of oat or barley flour; common in New
         England and Scotland

U.S. Gazetteer Counties (2000):

Bannock -- U.S. County in Idaho
   Population (2000):    75565
   Housing Units (2000): 29102
   Land area (2000):     1113.298450 sq. miles (2883.429627 sq. km)
   Water area (2000):    34.156636 sq. miles (88.465277 sq. km)
   Total area (2000):    1147.455086 sq. miles (2971.894904 sq. km)
   Located within:       Idaho (ID), FIPS 16
   Location:             42.777785 N, 112.346267 W
   Headwords:
    Bannock
    Bannock, ID
    Bannock County
    Bannock County, ID