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arrowworm

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Arrowworm \Ar"row*worm`\, n. (Zo["o]l.)
   A peculiar transparent worm of the genus {Sagitta}, living at
   the surface of the sea. See {Sagitta}.

资料来源 : WordNet®

arrowworm
     n : 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 [syn: {chaetognath}]
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