(n.) A genus of common motile microorganisms (Spirobacteria) having the form of spiral-shaped filaments. One species is said to be the cause of relapsing fever.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). spirillum. Retrieved September 23, 2026, from http://smartdefine.org/spirillum/definitions/2064992 |
| Chicago | Webster's. 2011. "spirillum" http://smartdefine.org/spirillum/definitions/2064992 (accessed September 23, 2026). |
| Harvard | Webster's 2011, spirillum, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/spirillum/definitions/2064992>. |
| MLA | Webster's. "spirillum" 28 May 2011. Web. 23 September 2026. <http://smartdefine.org/spirillum/definitions/2064992> |