Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A branch of physics that deals with light or the study of light and its effects.
  • n. That science concerned with the production of light and energy, especially regarding therapeutic applications.

from the GNU version of the Collaborative International Dictionary of English

  • n. The doctrine or science of light, explaining its nature and phenomena; optics.

from The Century Dictionary and Cyclopedia

  • n. The science of light.

Etymologies

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Examples

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