Hi vis overalls - High visibility overalls are used by workers on the roads, rails, and near cranes etc. Padded overalls - With padding material covering the inside for use in cold weather This definition was written in the context of Personal Protective Equipment (PPE)
Princeton's WordNet(0.00 / 0 votes)Rate this definition: conservation of mass, conservation of matter, law of conservation of mass, law of conservation of matter(noun) a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system. Chaldean Numerology.
The Law of Conservation of Matter says that matter can neither be created or destroyed, but can be changed in form. In other words, the total mass of the material(s) before the reaction is the same as the total mass of material(s) after the reaction. Generally, this fact has been confirmed by countless experiments.