- Any spider that habitually lives on or about the water, especially the large American species (Dolomedes lanceolatus) which runs rapidly on the surface of water; -- called also raft spider.
- A water mite.
- An aquatic European spider (Argyoneta aquatica) which constructs its web beneath the surface of the water on water plants. It lives in a bell-shaped structure of silk, open beneath like a diving bell, and filled with air which the spider carries down in the form of small bubbles attached one at a time to the spinnerets and hind feet. Called also diving spider.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). water spider. Retrieved September 28, 2026, from http://smartdefine.org/water_spider/definitions/2081004 |
| Chicago | Webster's. 2011. "water spider" http://smartdefine.org/water_spider/definitions/2081004 (accessed September 28, 2026). |
| Harvard | Webster's 2011, water spider, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/water_spider/definitions/2081004>. |
| MLA | Webster's. "water spider" 28 May 2011. Web. 28 September 2026. <http://smartdefine.org/water_spider/definitions/2081004> |