Glycerin. Glycerin is an ingredient that can be found in many beauty products because of its moisture locking properties. It is a form of sugar alcohol that is available naturally in vegetable oils and can also be the byproduct of soap making.
Definition of wheel and axle : a mechanical device consisting of a grooved wheel turned by a cord or chain with a rigidly attached axle (as for winding up a weight) together with the supporting standards
Virginia Department of Education Â© 2012 4. center hole of the wheel, and the wheel is free to turn around the axle.) A wheel and axle is a. simple machine that makes it easier to move objects.