(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.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). chaetognatha. Retrieved September 26, 2026, from http://smartdefine.org/chaetognatha/definitions/1986056 |
| Chicago | Webster's. 2011. "chaetognatha" http://smartdefine.org/chaetognatha/definitions/1986056 (accessed September 26, 2026). |
| Harvard | Webster's 2011, chaetognatha, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/chaetognatha/definitions/1986056>. |
| MLA | Webster's. "chaetognatha" 27 May 2011. Web. 26 September 2026. <http://smartdefine.org/chaetognatha/definitions/1986056> |