WordNet
n. a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system [syn: conservation of mass, law of conservation of mass, law of conservation of matter]
Usage examples of "conservation of matter".
That would be enough to place a single solitary atom in the void, and the Universe could grow from it as from a planted seed, now in a totally legitimate way, in accordance with the laws of physics and the principle of conservation of matter and energy.
Hayakawa kept stressing the conservation of matter and energy—.
Every spell had its price, and the bigger the spell, the higher the price: magic was as liable to the laws of thermodynamics and conservation of matter and energy as anything else.
Just as the Cherub had said, it was not gravity, not conservation of matter, nor onboard systems failure that was ripping apart the dimensions beneath them.
Then conservation of matter and energy holds only for the universe of universes.
Just as there are laws of Conservation of Matter and Energy, so there are in fact Laws of Conservation of Pain and Joy.
Precisely and exactly linked to the law of the conservation of matter.