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
1 Axle - the part at the center of a wheel; a wheel rotates around an axle with the help of ball bearings. 2  Body mechanics - refers to the best or safest body position to use in order to accomplish a heavy task.  Casters - the two small wheels at the front (or the rear) of the wheelchair which swivel in all directions.