What is the name of the fragments of grain husk that are separated from flour during milling?

The term used for the fragments of grain husk that are separated from flour during milling is "bran." Bran is the outer layer of the cereal grain and consists of several different components including fiber, vitamins, and minerals. When grains are milled to produce flour, the bran is separated from the starchy endosperm and the inner germ, which contains the embryo of the seed.

Bran is valued for its high fiber content and nutritional benefits, making it an important part of whole grain products. The milling process involves removing the bran along with other outer layers to produce refined flour, which has a finer texture but lacks some of the nutrients found in whole grain options. The germ refers to the nutrient-rich part that sprouts into a new plant, while the endosperm is the starchy component used primarily for energy. Chaff is the inedible part of the grain that is often discarded and not typically associated with the flour milling process.