(a.) Of or pertaining to or in the form of, a helix; spiral; as, a helical staircase; a helical spring.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). helical. Retrieved September 22, 2026, from http://smartdefine.org/helical/definitions/2015681 |
| Chicago | Webster's. 2011. "helical" http://smartdefine.org/helical/definitions/2015681 (accessed September 22, 2026). |
| Harvard | Webster's 2011, helical, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/helical/definitions/2015681>. |
| MLA | Webster's. "helical" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/helical/definitions/2015681> |