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The Collaborative International Dictionary
chaetognath

chaetognath \chaetognath\ 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: arrowworm.

Wiktionary
chaetognath

alt. Any of several marine worms of the phylum Chaetognatha. n. Any of several marine worms of the phylum Chaetognatha.

WordNet
chaetognath

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: arrowworm]