(n.) One of certain narrow, crooked valleys seen, by aid of the telescope, on the surface of the moon.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Rille. Retrieved September 21, 2026, from http://smartdefine.org/rille/definitions/2056074 |
| Chicago | Webster's. 2011. "Rille" http://smartdefine.org/rille/definitions/2056074 (accessed September 21, 2026). |
| Harvard | Webster's 2011, Rille, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/rille/definitions/2056074>. |
| MLA | Webster's. "Rille" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/rille/definitions/2056074> |