Flour is the finely ground and sifted meal of any of various edible grains. Giant steel or stone rollers are used to break and grind the grain. The fuller-flavored whole-wheat flour contains the wheat germ, which means that it also has a higher fiber, nutritional and fat content. Because of the latter, it should be stored in the refrigerator to prevent rancidity.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.