acorn worm(redirected from Enterepneusta)
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acorn worm:see HemichordataHemichordata
, small phylum of marine invertebrates closely related to both the echinoderms (phylum Echinodermata) and chordates (phylum Chordata). Acorn worms, class Enteropneusta, are the most common hemichordates.
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acorn worm[′ā‚kȯrn ‚wərm]
Any member of the class Enteropneusta, free-living animals that usually burrow in sand or mud. Also known as tongue worm.