Cogwheels of different types and sizes.
cogwheel definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a wheel with a rim notched into teeth, which mesh with those of another wheel or of a rack to transmit or receive motion
cogwheel definition by American Heritage Dictionary
- A toothed wheel.
- One of a set of cogged wheels within a mechanism.