(physics) the law that states any two bodies attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them WordNet 3.0 & Open English WordNet

Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between their centers. Wikipedia

The classical theory of gravitation Wikipedia Disambiguation

Classical mechanics physical law Wikidata

Physics: the force of mutual attraction between all masses in the universe. OmegaWiki