Source:http://linkedlifedata.com/resource/umls/id/C0031837
MSH: The study of those aspects of energy and matter in terms of elementary principles and laws. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed),CSP: science of the laws and phenomena of nature, especially the forces and general properties of matter and energy.,NCI: The study of those aspects of nature which can be understood in a fundamental way in terms of elementary principles and laws; the laws and properties of matter, and the forces acting upon it.