Chaetognatha
(n. pl.) An order of free-swimming marine worms, of which the genus Sagitta is the type. They have groups of curved spines on each side of the head.
Similar Words:
Chaetetes Chaetiferous Chaetodont Chaetognath Chaetognatha Chaetopod Chaetopoda Chaetotaxy Oligochaeta Perichaeth