1. 
   photocatalyst
   A substance that helps bring about a light-catalyzed reaction; e.g., chlorophyll. ... Origin: photo-+ G. Katalysis, dissolution (catalysis) ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?photocatalyst
   
   
2. 
   photocatalyst
   (fo″to-kat´ә-list) a substance such as chlorophyll that brings about a chemical reaction on exposure to light.
   Found op http://www.encyclo.co.uk/local/21001
   
   
3. 
   photocatalyst
   photocatalyst 1. A substance which in sunlight is utilized; such as, chlorophyll in the photosynthesis of carbohydrates by green plants. 2. A substance that is able to produce, by absorption of light, chemical transformations of the reaction participants; for example chlorophyll in a process of ph...
   Found op http://www.wordinfo.info/words/index/info/view_unit/2803/5
   
   
4. 
   photocatalyst
   Type: Term Pronunciation: fō′tō-kat′ă-list Definitions: 1. A substance that helps bring about a light-catalyzed reaction; chlorophyll.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=68588
   
   

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