Arrowworm Definition
arōwʉrm, erōwʉrm
noun
Any of a phylum (Chaetognatha) of small, wormlike marine animals with an arrow-shaped, finned, almost completely transparent body: they feed on plankton.
Webster's New World
(zoology) A transparent marine worm of the phylum Chaetognatha, found in plankton.
Wiktionary
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Noun
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