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|Noun||1.||Sipuncula - peanut worms|
animal kingdom, Animalia, kingdom Animalia - taxonomic kingdom comprising all living or extinct animals
peanut worm, sipunculid - small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut
phylum - (biology) the major taxonomic group of animals and plants; contains classes