THESAURUS
tracer
alpha radiator, atom, atomic cocktail, atomic model, ball, bar shot, beta radiator, bird shot, buckshot, bullet, cannon shot, cannonball, case shot, cobalt, crossbar shot, duck shot, dumdum bullet, expanding bullet, fission products, fluorescent paint, gamma radiator, grape, grapeshot, ion, langrel shot, manstopping bullet, nuclear atom, nuclide, pellet, planetary shell, radiator, radioactive waste, radiocalcium, radiocarbon, radiocopper, radioelement, radioiodine, radioisotope, radiosodium, radiothorium, radium, radium dial, radium paint, rifle ball, round shot, shell, shot, shrapnel, slug, split shot, subshell, tagged atom, tagged element,
tracer atom,
tracer element, valence shell