Definition of chlorophyll noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈklɒrəfɪl//
; NAmE NAmE//ˈklɔːrəfɪl//
[uncountable] Cell biology
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the green substance in plants that absorbs light from the sun to help them grow see also photosynthesis See related entries: Cell biology Word Originearly 19th cent.: coined in French from Greek khlōros ‘green’ + phullon ‘leaf’.
See the Oxford Advanced American Dictionary entry: chlorophyll