Definition of acorn worm in English:

acorn worm

Line breaks: acorn worm

noun

  • A burrowing worm-like marine animal of shallow waters. Its body consists of a proboscis, a collar, and a long trunk with gill slits, and contains a structure resembling a notochord.
    • Class Enteropneusta, phylum Hemichordata
    More example sentences
    • The cilia on the larvae of acorn worms capture algae.
    • Pterobranchs as very different from acorn worms; they form colonies in which the individuals are interconnected by stems, or stolons.
    • An acorn worm isn't much more than a thin, cylindrical bag with a head and collar resembling an acorn.

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