Source:http://linkedlifedata.com/resource/umls/id/C0033727
MSH: Stable elementary particles having the smallest known positive charge, found in the nuclei of all elements. The proton mass is less than that of a neutron. A proton is the nucleus of the light hydrogen atom, i.e., the hydrogen ion.,NCI: A small, positively charged particle of matter found in the atoms of all elements. Streams of protons generated by special equipment can be used for radiation treatment.,CSP: the nucleus of the light hydrogen atom; stable elementary particles having the smallest known positive charge, found in the nuclei of all elements.,NCI: A fundamental particle with a positive charge.