Look up decay in
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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

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