(n.) The arrangement of feathers in definite areas.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). pterylosis. Retrieved September 21, 2026, from http://smartdefine.org/pterylosis/definitions/2050639 |
| Chicago | Webster's. 2011. "pterylosis" http://smartdefine.org/pterylosis/definitions/2050639 (accessed September 21, 2026). |
| Harvard | Webster's 2011, pterylosis, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/pterylosis/definitions/2050639>. |
| MLA | Webster's. "pterylosis" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/pterylosis/definitions/2050639> |