noun
a type of small, marine worm belonging to the phylum Acoelomorpha, characterized by a lack of a body cavity (coelom)
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The acoel flatworm is a type of marine invertebrate found in various ocean habitats.
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I read an article about a cute little acoel worm in the ocean.
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That acoel worm is so tiny, it's almost like a speck!
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The company's new policy change was like trying to untangle acoel worms.