Plural of chloroplast; the green structures in plant and algae cells where light energy is converted into chemical energy through photosynthesis.
From chloro- (green, from Greek 'chloros') plus -plast (formed, from Greek 'plastos'), literally meaning 'green-formed' or 'green-shaper'.
A single plant cell can contain thousands of chloroplasts, and each one is like a tiny factory producing the sugar that feeds the entire planet—without them, almost all life on Earth would starve.
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