from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The emission of light that does not derive energy from the temperature of the emitting body, as in phosphorescence, fluorescence, and bioluminescence. Luminescence is caused by chemical, biochemical, or crystallographic changes, the motions of subatomic particles, or radiation-induced excitation of an atomic system.
- n. The light so emitted.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any emission of light that cannot be attributed merely to the temperature of the emitting body.
from the GNU version of the Collaborative International Dictionary of English
- n. Any emission of light not ascribable directly to incandescence, and therefore occurring at low temperatures, as in phosphorescence and fluorescence or other luminous radiation resulting from vital processes, chemical action, friction, solution, or the influence of light or of ultraviolet or cathode rays, etc.
- n. The faculty or power of producing light by biological processes, as in the firefly and glowworm. Also called bioluminescence.
- n. The light produced by biological or biochemical processes. Also called bioluminescence.
from The Century Dictionary and Cyclopedia
- n. See the quotation.
- n. The emission of light from causes other than that which produces incandescence.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. light not due to incandescence; occurs at low temperatures
- n. light from nonthermal sources
Sorry, no etymologies found.
The color, light refraction and luminescence is also very important.
I already knew that the aequorin luminescence was caused by an intramolecular reaction that takes place in the protein molecule, which would be difficult to study.
By 1978, we had achieved a general understanding of the aequorin luminescence reaction.
The unusual combination of familiar faces, and the unnerving sight of desolate domains viewed in night-vision luminescence is perfect for enjoying as the countdown to Halloween nears.
This illusion of luminescence is achieved not only through the reflectivity, but through changes in the skin tone:
Archaeologists used a technique called luminescence dating to show when the early settlers arrived.
The tools were dated using optically stimulated luminescence, which is able to date the sand grains on top of the tools and determine when they were last exposed to light, explained
In a technique called luminescence resonance energy transfer, two proteins in a cell are labeled with differently colored, luminescent molecules that absorb light of one color and give it off as another color.
This too would explain their type of luminescence, which is, according to existing astronomical knowledge, characteristic to young galaxies.
The samples have been dated by Glenn Thackray, a geosciences professor at ISU, using a relatively new process called luminescence dating.