What is the difference between corn flour and corn meal?

What is the difference between corn flour and corn meal?

I purchased some 100% stone ground whole grain corn flour.  I made some decent Breads with this as one of the ingredients.  My question is:

What is the differenct between corn flour and corn meal?  How different would my Breads have been, had I used the same amount of corn meal, instead of corn flour?

Thanks