A slender transparent wormlike animal with fins, having spines on the head for grasping prey. It is common in marine plankton. Also called chaetognath (see Chaetognatha).
- Phylum Chaetognatha.
- Chaetognaths (commonly named arrow worms) are transparent marine metazoans, ranging in size from 2 to 120 mm.
- As mentioned, the chaetognaths (‘arrow worms’) are clearly orthodox bilaterians.
- Early Cambrian ‘protoconodonts’ are currently believed to be the unrelated remains of chaetognaths (or ‘arrow worms’).
For editors and proofreaders
Syllabification: ar·row worm
Definition of arrow worm in:
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.