noun
a simple, nonflowering, and typically aquatic plant of a large group that includes the seaweeds and many single-celled forms
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Algae are photosynthetic organisms that can be found in various aquatic environments.
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I heard that algae can be used to make biofuel.
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Dude, did you know algae is like the coolest thing ever?
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The algae of negativity can cloud our minds if we let it grow unchecked.