brake shoe

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

• noun A curved metal block that presses against and arrests the rotation of a wheel or brake drum.

from The Century Dictionary.

• noun A piece of wood or metal fitted to a brake-block, or forming one piece with it, and serving as a rubber to retard, by friction with the wheel-tread or-tire, the movement of a wheel.

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

• noun An element of a drum brake into which the friction-producing brake lining is attached.

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

• noun a restraint provided when the brake linings are moved hydraulically against the brake drum to retard the wheel's rotation