Source:http://linkedlifedata.com/resource/umls/id/C0007996
MSH: A basic science concerned with the composition, structure, and properties of matter; and the reactions that occur between substances and the associated energy exchange.,CSP: scientific study of the properties, composition and structure of matter, changes in structure and composition, and accompanying energy changes.,NCI: The science of the composition, structure, properties, and reactions of matter, especially of atomic and molecular systems.