from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A phenomenon in which certain minerals release previously absorbed radiation upon being moderately heated.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The release of previously absorbed radiation upon being heated.
from the GNU version of the Collaborative International Dictionary of English
- n. Luminescence exhibited by a substance on being moderately heated. It is shown esp. by certain substances that have been exposed to the action of light or to X-rays.
from The Century Dictionary and Cyclopedia
- n. Luminescence produced by heating a body which exhibits phosphorescence.
thermo- + luminescence (Wiktionary)