acorn worm
noun
: any of a class (Enteropneusta) of burrowing wormlike marine animals having an acorn-shaped proboscis and classified with the hemichordates
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An enteropneust, or acorn worm, in the process of leaving behind its characteristic fecal coil on the bottom of the ocean in the Sirena Canyon.
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Carl Engelking, Discover Magazine, 18 May 2016
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Carl Engelking, Discover Magazine, 18 May 2016
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“Acorn worm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acorn%20worm. Accessed 9 Sep. 2025.
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