1. (n.) Act of irradiating, or state of being irradiated.

2. (n.) Illumination; irradiance; brilliancy.

3. (n.) Fig.: Mental light or illumination.

4. (n.) The apparent enlargement of a bright object seen upon a dark ground, due to the fact that the portions of the retina around the image are stimulated by the intense light; as when a dark spot on a white ground appears smaller, or a white spot on a dark ground larger, than it really is, esp. when a little out of focus.

X-ray dosimetry X-ray therapy anhydration arc lighting black and white blast-freezing bottling brining canning chiaroscuro cobalt therapy contrast corning curietherapy curing decorative lighting dehydration desiccation direct lighting dry-curing drying electric lighting emanation embalming enlightenment evaporation festoon lighting floodlighting fluorescent lighting freeze-drying freezing fuming gaslighting glow lighting highlight highlights illumination incandescent lighting indirect lighting interstitial irradiation therapy irradiance irradiancy irradiation therapy isotope therapy jerking light light and shade light source lighting luminous energy marination mummification overhead lighting photosensitivity pickling potting quick-freezing radiance radiancy radiant energy radiation radiation therapy radiotherapeutics radiotherapy radium therapy radiumization ray therapy refrigeration roentgen ray therapy roentgenization roentgenometry roentgenotherapy roentgentherapy salting seasoning sidelight smoking spot lighting stage lighting strip lighting stuffing taxidermy tinning tonality visible radiation