1. producing light without heat through chemical or biological processes

Examples

• The luminescent jellyfish glowed softly in the dark water.
• Scientists studied the luminescent bacteria that made the ocean sparkle at night.
• The watch face had luminescent numbers that could be seen in complete darkness.
• Fireflies create their luminescent display through a chemical reaction in their bodies.
• The luminescent paint on the emergency exit sign helped guide people to safety.
• Deep-sea creatures often have luminescent organs to attract prey or communicate.