Definition of peanut worm in English:

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.

    • ‘Sipunculans, or peanut worms, have an unsegmented body with a retractable introvert.’
    • ‘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.’