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
axle. 1  a shaft on which a wheel rotates. 2  one of two shafts extending from the body of a cart or carriage on either side of the animal that pulls it. 3  an axle that carries a wheel but without power to drive it. 4  the part of the axle contained by a bearing. 5  the axle of a self-propelled vehicle that provides the driving power.