- (n.) A pitcher-shaped or flask-shaped, organ or appendage of a plant, as the leaves of the pitcher plant or the little bladderlike traps of the bladderwort (Utricularia).
- (n.) A genus of simple ascidians, which formerly included most of the known species. It is sometimes used as a name for the Ascidioidea or for all the Tunicata.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). ascidium. Retrieved September 23, 2026, from http://smartdefine.org/ascidium/definitions/1976213 |
| Chicago | Webster's. 2011. "ascidium" http://smartdefine.org/ascidium/definitions/1976213 (accessed September 23, 2026). |
| Harvard | Webster's 2011, ascidium, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/ascidium/definitions/1976213>. |
| MLA | Webster's. "ascidium" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/ascidium/definitions/1976213> |