photocatalyst /pho·to·cat·a·lyst/ (-kat´ah-list) a substance, e.g., chlorophyll, that brings about a chemical reaction to light.
pho·to·cat·a·lyst (f  t-k t l- st)n. A substance that helps bring about a light-catalyzed reaction, such as chlorophyll in photosynthesis. |
photocatalyst
a substance, e.g. chlorophyll, that brings about a chemical reaction on exposure to light.
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