bran

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The outer layers of the grain of cereals such as wheat, removed during the process of milling and used as a source of dietary fiber.

from The Century Dictionary.

• noun The outer coat of wheat, rye, or other farinaceous grain; the husky portion of ground wheat, separated from the flour by bolting.
• To steep in a bath of bran and water, as cloth before or after dyeing, or skins for tanning.
• noun A name of the common crow
• A dialectal form of bren, burn.

from the GNU version of the Collaborative International Dictionary of English.

• noun The broken coat of the seed of wheat, rye, or other cereal grain, separated from the flour or meal by sifting or bolting; the coarse, chaffy part of ground grain.
• noun (Zoöl.) The European carrion crow.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The broken coat of the seed of wheat, rye, or other cereal grain, separated from the flour or meal by sifting or bolting; the coarse, chaffy part of ground grain.
• noun The European carrion crow.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun food prepared from the husks of cereal grains
• noun broken husks of the seeds of cereal grains that are separated from the flour by sifting