Decay
Decay may refer to:

Science and technology
Bit decay, in computing
Software decay, in computing
Distance decay, in geography
Decay time (fall time), in electronics

Biology
Decomposition of organic matter
Tooth decay (dental caries), in dentistry
Mitochondrial decay, in genetics

Physics
Orbital decay, the process of prolonged reduction in the height of a satellite's orbit
Particle decay
Radioactive decay
Optical decay, in quantum physics

Mathematics
Exponential decay

Psychology and sociology
Decay theory, in psychology and memory
Social decay (decadence), in sociology
Urban decay, in sociology

Entertainment
Network decay (channel drift), in television programming
Decay (DC Comics), a comic book character
Half-Life: Decay, a 2001 video game add-on
Deekay, a Danish production team
Decay (professional wrestling), a professional wrestling stable in TNA Wrestling

Film
Decay (2012 film), a 2012 zombie film set at the Large Hadron Collider
Decay (2015 film), a 2015 American film

Music
how quickly the sound drops to the sustain level after the initial peak, see ADSR envelope
"Decay" (Ride song)
"Decay" (Biohazard song)
"Decay" (Sevendust song), 2013
Decay Music, 1976 music album by Michael Nyman
The Years of Decay, music album by Overkill (band)
In Decay, 2012 album by Com Truise

Other
Beta decay (finance)

See also
Weathering
Decomposition (disambiguation)
All pages with titles beginning with Decay 
All pages with titles containing Decay