| PHOTOCATHODES | • photocathodes n. Plural of photocathode. • PHOTOCATHODE n. a cathode that emits electrons when exposed to radiant energy and esp. light. | 
| PHOTOCHEMICAL | • photochemical adj. (Chemistry) of, relating to, or produced by photochemistry or by photochemical reactions. • photochemical n. Any chemical compound (such as silver halides) used in photography. • PHOTOCHEMICAL adj. of, relating to, or resulting from the chemical action of radiant energy and esp. light. | 
| PHOTOCHEMISTS | • photochemists n. Plural of photochemist. • PHOTOCHEMIST n. a practitioner of photochemistry. | 
| PHOTOCHROMICS | • photochromics n. The study of photochromism. • PHOTOCHROMIC n. a photochromic material. | 
| PHOTOCHROMIES | • photochromies n. Plural of photochromy. • PHOTOCHROMY n. a former process of colour photography. | 
| PHOTOCHROMISM | • photochromism n. The reversible transformation of the optical properties of a material when exposed to electromagnetic… • PHOTOCHROMISM n. the property of changing color on exposure to light or other radiation and of reverting to original color immediately the light or radiation source is removed. | 
| PHOTOCOMPOSED | • photocomposed v. Simple past tense and past participle of photocompose. • PHOTOCOMPOSE v. to set (as reading matter) by photocomposition. | 
| PHOTOCOMPOSER | • photocomposer n. A machine that performs photocomposition. • PHOTOCOMPOSER n. one who photocomposes. | 
| PHOTOCOMPOSES | • photocomposes v. Third-person singular simple present indicative form of photocompose. • PHOTOCOMPOSE v. to set (as reading matter) by photocomposition. | 
| PHOTOCOPIABLE | • photocopiable adj. Capable of being photocopied. • PHOTOCOPIABLE adj. that can be photocopied. | 
| PHOTOCOPYINGS | • photocopyings n. Plural of photocopying. • PHOTOCOPYING n. the act of making a photocopy. | 
| PHOTOCURRENTS | • photocurrents n. Plural of photocurrent. • PHOTOCURRENT n. a stream of electrons produced by photoelectric or photovoltaic effects. |