- A common North American colubrine snake (Tropidonotus sipedon) which lives chiefly in the water.
- Any species of snakes of the family Homalopsidae, all of which are aquatic in their habits.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). water snake. Retrieved September 26, 2026, from http://smartdefine.org/water_snake/definitions/2080998 |
| Chicago | Webster's. 2011. "water snake" http://smartdefine.org/water_snake/definitions/2080998 (accessed September 26, 2026). |
| Harvard | Webster's 2011, water snake, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/water_snake/definitions/2080998>. |
| MLA | Webster's. "water snake" 28 May 2011. Web. 26 September 2026. <http://smartdefine.org/water_snake/definitions/2080998> |