phylum Chaetognatha


Also found in: Thesaurus, Encyclopedia.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.phylum Chaetognatha - arrowworms: a group of small active transparent marine wormsphylum Chaetognatha - arrowworms: a group of small active transparent marine worms
animal kingdom, Animalia, kingdom Animalia - taxonomic kingdom comprising all living or extinct animals
arrowworm, chaetognath - 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
genus Sagitta - chief genus of Chaetognatha including the largest arrowworms
genus Spadella - marine worms resembling the sagittas but with a broader body and only one pair of lateral fins
phylum - (biology) the major taxonomic group of animals and plants; contains classes
References in periodicals archive ?
Na-channel-based excitability in invertebrate muscle fibers was previously reported to exist only in the phylum Chaetognatha (comprising the "arrow worms", ref.