acorn worm(redirected from Enterepneusta)
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Any of a class (Enteropneusta) of hemichordate, wormlike animals that inhabit intertidal areas and soft marine sediments and have an acorn-shaped proboscis.
(Animals) 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)
any wormlike marine animal of the phylum Hemichordata, having gill slits and an acorn-shaped proboscis and collar.