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Definition of Peanut worm
1. Noun. Small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut.
Exact synonyms: Sipunculid
Generic synonyms: Invertebrate
Group relationships: Phylum Sipuncula, Sipuncula
Generic synonyms: Invertebrate
Group relationships: Phylum Sipuncula, Sipuncula