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| | The effect produced when certain substances are exposed to light. In cancer treatment, some drugs become active when exposed to light and are then able to kill tumor cells. |
| Previous Definitions: | phospholipid complex, phosphoric, phosphorus, phosphorus-32, phosphorylation | | Next Definitions: | photocoagulation, photodynamic therapy, Photofrin, photon-beam radiation, photopheresis |
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