An alternate or informal spelling of chlorophyll, the green pigment in plants that captures light energy for photosynthesis.
From chloro- (Greek chloros, green) plus -phyl (Greek phyllon, leaf). This shorter spelling emerged in popular and older scientific texts as a variant of chlorophyll.
Chlorophyl versus chlorophyll is one of those spelling wars where chemistry settled on 'chlorophyll' with two l's to match Greek pronunciation, but 'chlorophyl' persists in some brands and older texts—it's like how 'doughnut' and 'donut' both won, but one is way more common.
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