chlorophyll

noun
🔊/ˈklɒrəfɪl/
🔊/ˈklɔːrəfɪl/
[uncountable]
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  1. the green substance in plants that takes in light from the sun to help them grow 叶绿素see also photosynthesisTopics Plants and treesc2, Biologyc2
    Word Originearly 19th cent.: coined in French from Greek khlōros ‘green’ + phullon ‘leaf’.