“+ adjective
Etymology: International Scientific Vocabulary radio- + active
: of, relating to, caused by, or exhibiting radioactivity
radioactive element
radioactive decay
radioactive isotope
“+ adjective
Etymology: International Scientific Vocabulary radio- + active
: of, relating to, caused by, or exhibiting radioactivity
radioactive element
radioactive decay
radioactive isotope
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012