peanut worm
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Related to peanut worm: Bristle worm
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Noun | 1. | peanut worm - small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classification phylum Sipuncula, Sipuncula - peanut worms |
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