from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The absorption of infrared radiation and subsequent emission of visible light

from the GNU version of the Collaborative International Dictionary of English

  • n. The conversion of obscure radiant heat into light; the transmutation of rays of heat into others of higher refrangibility.

from The Century Dictionary and Cyclopedia

  • n. A name given by Tyndall to a luminous phenomenon, observed when the invisible heat-rays from an appropriate source are converged to a focus by a lens or mirror upon a piece of charcoal, which is thus heated to incandescence.


Sorry, no etymologies found.


  • In fact, carbon when perfectly dissolved and incorporated with a good white glass, is highly transparent to the calorific rays, and by employing it as an absorbent the phenomena of 'calorescence' may be obtained, though in a less striking form than with the iodine.

    Fragments of science, V. 1-2

  • [Footnote: On investigating the calorescence produced by rays transmitted through glasses of various colours, it was found that in the case of certain specimens of blue glass, the platinum foil glowed with a pink or purplish light.

    Fragments of science, V. 1-2


Log in or sign up to get involved in the conversation. It's quick and easy.