Arrowworm

n.

1.

(Zool.) A peculiar transparent worm of the genus Sagitta, living at the surface of the sea. See Sagitta.

Noun

1.

arrowworm - 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

chaetognath, Chaetognatha, phylum Chaetognatha, sagitta, worm