emit light

Some bodies, especially phosphorus, and animal substances tending to putrefaction, emit light without being sensibly hot.

Glowworms emit light only for a short period in the year; and I have but partially observed it after the middle of July.

Those which emit light from their own substance; not shining by borrowed, or reflected light.

A large number of substances examined by Stokes, when excited by the invisible ultra-violet waves, have been proved to emit light.

Fluor spar, and some other substances, when raised to a temperature still under redness, emit light.