Definition:
"""""""""""""""" A cereal plant is most important kind grown in temperate countries, the grain of which is ground to make flour for bread, pasta, and pastry, etc. 

Example:
"""""""""""""" Other iron age crops included the more ancient emmer wheat (Tritium dicoccum, which was growing on light soils), bread wheat, oats, rye, peas, Celtic beans, and flax. 

Flour:
""""""""" A powder obtained by grinding grain, typically wheat, and used to make bread, cake and pastry.