Mechanoluminescence

• 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.
• Electrochemiluminescence is the emission induced by an electrochemical stimulus.