(n.pl.) An order of sponges having a skeleton composed of hornlike fibers. It includes the commercial sponges.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Keratosa. Retrieved September 23, 2026, from http://smartdefine.org/keratosa/definitions/2025271 |
| Chicago | Webster's. 2011. "Keratosa" http://smartdefine.org/keratosa/definitions/2025271 (accessed September 23, 2026). |
| Harvard | Webster's 2011, Keratosa, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/keratosa/definitions/2025271>. |
| MLA | Webster's. "Keratosa" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/keratosa/definitions/2025271> |