| Look up decay in Wiktionary, the free dictionary. |
Decay may refer to:
- Decay (DC Comics), a comic book character
- Bacterial decay, decomposition of organic matter
- Radioactive decay
- Urban decay
- Particle decay, in physics
- Orbital decay, the process of prolonged reduction in the height of a satellite's orbit
- Half-Life: Decay, a computer game add-on
- Dental caries, also known as tooth decay
- Exponential decay, the decrease of a value in proportion to its value
- In music, how quickly the sound drops to the sustain level after the initial peak, see ADSR envelope
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