Meaning & use
plastid
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A small organelle found in the cells of plants and algae that carries out functions such as photosynthesis, pigment production, or nutrient storage.
See it in a sentence
Chloroplasts are the type of plastid responsible for photosynthesis.
The cell's plastids contained the pigments that give the leaf its red color in autumn.
A note on using this word
Plastids come in several forms besides chloroplasts, including chromoplasts (pigment storage) and leucoplasts (starch or oil storage), all sharing a common evolutionary origin.
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