Definition of peanut worm in English:

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peanut worm

noun

An unsegmented burrowing marine worm with a stout body and a slender anterior part. The latter bears a terminal mouth surrounded by tentacles, and can be retracted into the trunk.
Example sentences
  • Settling near a hungry snail could be disastrous for a peanut worm, and landing too far from kelp would doom a sea urchin to starvation.
  • Sipunculans, or peanut worms, have an unsegmented body with a retractable introvert.
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