arrowworm

Definitions of arrowworm
  1. noun
    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
    synonyms: chaetognath
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    types:
    sagitta
    any arrowworm of the genus Sagitta
    type of:
    worm
    any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae
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