adjective
Definition: Relating to a group of marine animals known for their transparent bodies and arrow-like shape, which belong to the phylum Chaetognatha.
Example: The chaetognath species are often found in the open ocean, swimming gracefully through the water.
noun
Definition: A type of marine worm that belongs to the phylum Chaetognatha, commonly known as arrow worms, which are characterized by their elongated bodies and transparent appearance.
Example: The chaetognath is an important part of the marine food web, serving as both predator and prey.