| phosphorescence |
a fluorescence that persists after the bombarding radiation has ceased
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|---|---|
| phosphorous acid |
hypophosphorous acid: a clear or yellow monobasic acid (H3PO2)
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| photo- |
photograph: a picture of a person or scene in the form of a print or transparent slide; recorded by a camera on light-sensitive material
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| photosynthesis |
synthesis of compounds with the aid of radiant energy (especially in plants)
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| photochemical |
of or relating to or produced by the effects of light on chemical systems
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