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Mechanoluminescence is light emission resulting from any mechanical action on a solid. It can be produced through ultrasound, or through other means.
- Fractoluminescence is caused by stress that results in the formation of fractures.
- Piezoluminescence is caused by pressure that results only in elastic deformation.
- Triboluminescence is nominally caused by rubbing, but actually because of resulting fractoluminescence, so is often used as a synonym.
- Sonoluminescence is the emission of short bursts of light from imploding bubbles in a liquid when excited by sound.