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.
- Phylum Sipuncula
More 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.
Definition of peanut worm in:
- The British & World English dictionary