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acorn worm
or acorn·worm
noun
- any of several burrowing, often brilliantly colored hemichordates of the class Enteropneusta, usually found in intertidal sand and mud, having an acorn-shaped proboscis and collar.
acorn worm
noun
- any of various small burrowing marine animals of the genus Balanoglossus and related genera, having an elongated wormlike body with an acorn-shaped eversible proboscis at the head end: subphylum Hemichordata (hemichordates)
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Word History and Origins
Origin of acorn worm1
First recorded in 1885–90
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