| photodynamic | Relating to the energy or force exerted by light. Origin: photo-+ G. Dynamis, force (05 Mar 2000) |
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| photodynamic radiation therapy | <oncology, technique> A light sensitive drug is given through a vein and concentrates in the tumour. Then, during a surgical procedure, a special light activates the drug. The activated drug kills tumour cells. (31 Dec 1997) |
| photodynamic sensitization | The action by which certain substances, notably fluorescing dyes (acridine, eosin, methylene blue, rose bengal) absorb visible light and emit the energy at wavelengths that are deleterious to microbes or other organisms in the dye-containing suspension, or selectively destroy cancer cells sensitised by intravenous porphyrin and exposed to red laser light. Synonym: photosensitization. (05 Mar 2000) |
| photodynamic therapy | <oncology, technique> Cancer treatment that uses the interaction between laser light and a substance that makes cells more sensitive to light. When light is applied to cells that have been treated with this substance, a chemical reaction occurs and destroys cancer cells. (31 Dec 1997) |