(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 22, 2026, from http://smartdefine.org/keratosa/definitions/2025271 |
| Chicago | Webster's. 2011. "keratosa" http://smartdefine.org/keratosa/definitions/2025271 (accessed September 22, 2026). |
| Harvard | Webster's 2011, keratosa, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/keratosa/definitions/2025271>. |
| MLA | Webster's. "keratosa" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/keratosa/definitions/2025271> |