Photo call
noun
1.
a time arranged for photographers, esp press photographers, to take pictures of a celebrity, the cast of a play, etc, usually for publicity purposes
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/ˈfəʊtəʊˌkɑːd/ noun 1. an identity card containing a photograph of the bearer noun an identification card with one’s personal photo on it Usage Note British
- Photocatalysis
[foh-toh-kuh-tal-i-sis] /ˌfoʊ toʊ kəˈtæl ɪ sɪs/ noun, plural photocatalyses [foh-toh-kuh-tal-i-seez] /ˌfoʊ toʊ kəˈtæl ɪˌsiz/ (Show IPA). Chemistry. 1. the acceleration or retardation of the reaction rate in chemical reactions by light. /ˌfəʊtəʊkəˈtælɪsɪs/ noun (pl) -ses (-siːz) 1. the alteration of the rate of a chemical reaction by light or other electromagnetic radiation
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photocatalyst pho·to·cat·a·lyst (fō’tō-kāt’l-ĭst) n. A substance that helps bring about a light-catalyzed reaction, such as chlorophyll in photosynthesis.
- Photocatalytic
[foh-toh-kuh-tal-i-sis] /ˌfoʊ toʊ kəˈtæl ɪ sɪs/ noun, plural photocatalyses [foh-toh-kuh-tal-i-seez] /ˌfoʊ toʊ kəˈtæl ɪˌsiz/ (Show IPA). Chemistry. 1. the acceleration or retardation of the reaction rate in chemical reactions by light. /ˌfəʊtəʊkəˈtælɪsɪs/ noun (pl) -ses (-siːz) 1. the alteration of the rate of a chemical reaction by light or other electromagnetic radiation
- Photocathode
[foh-toh-kath-ohd] /ˌfoʊ toʊˈkæθ oʊd/ noun 1. a , typically of a cesium or sodium compound, having the property of emitting electrons when activated by light or other radiation. /ˌfəʊtəʊˈkæθəʊd/ noun 1. a cathode that undergoes or is used for photoemission