plural noun Chae·tog·na·tha \kēˈtägnəthə\

Definition of Chaetognatha

  1. :  a phylum of small, slender marine animals comprising the arrow worms But the absence of a definite synapomorphy between Chaetognatha and any other metazoan taxon except Bilateria itself has cast the arrowworms into an enduring isolation. — Edward E. Ruppert et al., Invertebrate Zoology: A Functional Evolutionary Approach, 2004 — see also sagitta, spadella


\-thən\ adjective


\-thəs\ adjective

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Origin and Etymology of chaetognatha

New Latin, from chaet- + -gnatha

Seen and Heard

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a brief usually trivial fact

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