decay

[dɪˈkeɪ]
vb
to decline or cause to decline gradually in health, prosperity, excellence, etc; deteriorate; waste away
to rot or cause to rot as a result of bacterial, fungal, or chemical action; decompose
Also called: disintegrate (of an atomic nucleus) to undergo radioactive disintegration.(of an elementary particle) to transform into two or more different elementary particles
(of a stored charge, magnetic flux, etc) to decrease gradually when the source of energy has been removed
n
the process of decline, as in health, mentality, beauty, etc
the state brought about by this process
decomposition, as of vegetable matter
rotten or decayed matter
the dentist drilled out the decay
See radioactive decay .a spontaneous transformation of an elementary particle into two or more different particles.of an excited atom or molecule, losing energy by the spontaneous emission of photons
a gradual decrease of a stored charge, magnetic flux, current, etc, when the source of energy has been removedSee time constant
the fading away of a note