Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The study or application of electromagnetic energy whose basic unit is the photon, using technology such as optics, lasers and other light sources, fiber optics, electrical engineering, and materials science in numerous applications including communications, electrical engineering, materials science, and information storage and processing.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun sciences the science and technology of generating and controlling photons, particularly in the visible and near infrared light spectrum

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

photon (light) + -ics (pertaining to)

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