| photoluminescent | Having the ability to become luminescent upon exposure to visible light. Origin: photo-+ L. Lumen, light (05 Mar 2000) |
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| photolyase | See: deoxyribodipyrimidine photolyase. Origin: photo-+ G. Lyo, to loosen, + -ase (05 Mar 2000) |
| photolysis | <chemistry> Light induced cleavage of a chemical bond, as in the process of photosynthesis. (18 Nov 1997) |
| photolyte | Any product of decomposition by light. (05 Mar 2000) |
| photolytic | Pertaining to photolysis. (05 Mar 2000) |
| photomacrograph | <microscopy> Photograph in the magnification range of conventional macrophotography (less than ~40X) taken with a single lens system, often a microscope objective. (05 Aug 1998) |
| photomacrography | <microscopy> Close-up photography at a limiting magnification of 40X or thereabouts and taken with a single lens system such as a A HREF=photomacrographic lens> Photomacrographic lens or a microscope objective. (05 Aug 1998) |
| photomagnetic | Of or pertaining to photomagnetism. Source: Websters Dictionary (01 Mar 1998) |
| photomagnetism | The branch of science which treats of the relation of magnetism to light. Source: Websters Dictionary (01 Mar 1998) |
| photomania | <psychiatry> Morbid or exaggerated desire for light. Origin: photo-+ G. Mania, frenzy (05 Mar 2000) |
| photomechanical | Pertaining to, or designating, any photographic process in which a printing surface is obtained without the intervention of hand engraving. Source: Websters Dictionary (01 Mar 1998) |
| photometer | <apparatus, physics> An instrument for measuring the intensity of light, or, more especially, for comparing the relative intensities of different lights, or their relative illuminating power. Origin: Photo: cf. F. Photometre. (24 Mar 1998) |
| photometry | The measurement of the intensity of light. (05 Mar 2000) |
| photomicrograph | <microscopy> An image enlarges approximately 40X or higher, produced by light, cf., electron micrograph. (05 Aug 1998) |
| photomicrography | <microscopy> This term should not be reversed into microphotography. A photomicrograph is a photograph of a small object, the image of which is magnified more than approximately 40X by means of a compound microscope. A microphotograph is a small photograph, requiring an enlargement or a lens system in order to view it, the image is minified. (05 Aug 1998) |