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[From New Latin Chaetognatha, phylum name : chaeta, chaeta; see chaeta + Greek gnathos, jaw; see genu- in Indo-European roots.]

chae′tog·nath′ adj.


(Animals) any small wormlike marine invertebrate of the phylum Chaetognatha, including the arrowworms, having a coelom and a ring of bristles around the mouth
[C19: New Latin Chaetognatha, literally: hair-jaw, from chaeta + Greek gnathos jaw]


(ˈki tɒgˌnæθ, -təg-)

1. any invertebrate of the phylum Chaetognatha, comprising the arrowworms.
2. Also, chae•tog•na•than (kiˈtɒg nə θən) belonging or pertaining to the chaetognaths.
[1885–90; < New Latin Chaetognatha]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.chaetognath - any worm of the Chaetognathachaetognath - 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
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
Chaetognatha, phylum Chaetognatha - arrowworms: a group of small active transparent marine worms
sagitta - any arrowworm of the genus Sagitta
References in periodicals archive ?
This has recently been confirmed by the discovery of Cambrian chaetognath body fossils (Chen & Huang 2002) with grasping spines preserved, which is suggestive of an affiliation between coelocerodonts and chaetognaths.
Responses of the chaetognath, Sagitta elegans, and larval Pacific hake, Merluccius productus, to spring diatom and copepod blooms in a temperate fjord (Dabob Bay, Washington, USA).
of Area (n) fish Chiniak Bay 5 75 Ugak Bay [less than or 3 31 equal to] 66 mm >66 mm 4 60 Kiliuda Bay [less than or 1 5 equal to] 66 mm >66 mm 6 61 Shelf 6 65 Prey (number of individuals/fish) (1) crab Area amphipod chaetognath copepod larvae Chiniak Bay 2.
The numbers of individuals of each prey taxon were estimated from the numbers of prey parts, such as copepod mandibles, amphipod heads and chaetognath seizing hooks.
Plankton samples were comprised of primarily crustaceans (copepods, amphipods, euphausiids, and decapod (brachyuran, pagurid, caridean) larvae) and chaetognaths with some polychaetes, gastropods, cnidarians, echinoderm larvae, and fish larvae and eggs; no red, blue, or golden king crab larvae were present.
They seek plankton patches dominated by tiny crustaceans--shrimp, copepods--and predatory worms called chaetognaths.
Some examples include arrow worms (or chaetognaths - see photo above) and amphipods (photo at right), which are voracious predators on copepods and larvae of larger species.
Included in the new assemblage of more than 1,000 specimens are the first representatives of modern chaetognaths (arrowworms) and ctenophores (jellyfish).
Book 1: algae and macrophytes, protists, sponges, coelenterates, molluscs, crustaceans, insects, chaetognaths, annelids, echinoderms, and tunicates
The 10 prey categories were chaetognaths, euphausiids, amphipods, copepods, crab, miscellaneous, and pollock (<60 mm standard length [SL], 60-200 mm SL, [greater than or equal to]200 mm SL, and unmeasured).
chaetognaths, hyperiid amphipods, other), which were counted and weighed.