The green papery fronds of several seaweeds of the genus Ulva, sometimes used as food.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). sea lettuce. Retrieved September 28, 2026, from http://smartdefine.org/sea_lettuce/definitions/2059382 |
| Chicago | Webster's. 2011. "sea lettuce" http://smartdefine.org/sea_lettuce/definitions/2059382 (accessed September 28, 2026). |
| Harvard | Webster's 2011, sea lettuce, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/sea_lettuce/definitions/2059382>. |
| MLA | Webster's. "sea lettuce" 28 May 2011. Web. 28 September 2026. <http://smartdefine.org/sea_lettuce/definitions/2059382> |