radioactive decay(n = noun.process) decay, disintegration - the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation;
is a kind of nuclear reaction
has particulars: alpha decay, beta decay

alpha decay, beta decay, decay, exponential decay, high-level radioactive waste, low-level radioactive waste, radioactive, radioactive dating, radioactive dust, radioactive iodine excretion test, radioactive iodine test, radioactive iodine uptake test, radioactive material, radioactive waste, tooth decay