Source : Webster's Revised Unabridged Dictionary (1913)

Breadstuff \Bread"stuff\, n.
   Grain, flour, or meal of which bread is made.

Source : WordNet®

breadstuff
     n 1: food made from dough of flour or meal and usually raised
          with yeast or baking powder and then baked [syn: {bread},
           {staff of life}]
     2: flour or meal or grain used in baking bread