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arrowworm
Nounarrowworm has 1 sense
arrowworm, chaetognath - any worm of the Chaetognatha; transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth --1is a kind ofworm --1is a member of Chaetognatha, phylum Chaetognatha --1has particulars: sagitta