acorn worm meaning

  "acorn worm" in a sentence
  Any of various wormlike sea-animals (enteropneusts) of the Hemichordata which have a proboscis and collar somewhat like an acorn in shape
  • acorn:    Noun: acorn & ...
  • worm:    Noun: worm &n ...
  • worm in:    [American slang]v. ...


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  1. Acorn worms breathe by drawing in oxygenated water through their mouth.
  2. Thus, the acorn worm breathes about the same way as fish.
  3. Acorn worms are solitary worm-shaped organisms.
  4. Acorn worms move only sluggishly, using ciliary action and peristalsis of the proboscis.
  5. Among lesser phyla of invertebrates are the Hemichordata, or acorn worms, and the Chaetognatha, or arrow worms.

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