from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of or relating to the energy of light.
  • adj. Enhancing the effects of or inducing a toxic reaction to light, especially to ultraviolet light.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. of, relating to, or caused by the energy or momentum of light or other electromagnetic radiations
  • adj. of, or relating to photodynamics

from The Century Dictionary and Cyclopedia

  • Of or pertaining to the energy or effect of light.


Sorry, no etymologies found.


  • Then, in a process called photodynamic therapy, it is activated by light, destroying the vessels without harming other parts of the retina.

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  • It might sound futuristic, but a select number of cancer patients already benefit from the method, called photodynamic therapy .

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  • This type of cancer treatment, called photodynamic therapy, is already used for tumors within the body.

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  • The approach is called photodynamic therapy, or PDT, which uses light energy to activate a drug called a photosensitizer that produces a form of oxygen that kills nearby cells.

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  • During his treatments, Colbert used a procedure called photodynamic therapy, or blue light, which uses a substance known as levulan applied topically and placed under a light to kill pre-cancer cells. - Local News

  • "The doctor told me that cosmetically this would be much better. he treatment is called photodynamic therapy."

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  • This type of treatment, known as photodynamic therapy, increased collagen levels in the skin and also produced other skin changes that are known to improve its appearance.

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  • A mesothelioma treatment option can include radiation, chemotherapy or surgery, but it can also include innovative treatments such as photodynamic therapy immunotherapy, gene therapy, or alternative medicine.

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  • Another alternative is photodynamic therapy, in which creams or injections make the precancers sensitive to light, before they are killed with a laser.

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  • Surgical excision can be supplemented by a number of other possible treatments including cryotherapy and laser treatment for early lesions as well as photodynamic therapy.

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