S: (n) decay, radioactive decay, disintegration (the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation)
S: (n) process, physical process (a sustained phenomenon or one marked by gradual changes through a series of states) "events now in process"; "the process of calcification begins later for boys than for girls"
W: (v) disintegrate [Related to: disintegration] (lose a stored charge, magnetic flux, or current) "the particles disintegrated during the nuclear fission process"
S: (n) annihilation, disintegration (total destruction) "bomb tests resulted in the annihilation of the atoll"