noun
a phylum of marine worms characterized by a lack of a coelom, or body cavity
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The acoela is a phylum of small, marine worms that lack a coelom.
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I learned about acoela in my marine biology class - they're tiny worms that live in the ocean.
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Those acoela worms are so weird-looking, like little sea noodles.
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The acoela's simplicity in structure serves as a reminder of the beauty in minimalism.