(n.) One of a large class or division of the vegetable kingdom, which includes those flowerless plants, such as fungi, algae, and lichens, that consist of a thallus only, composed of cellular tissue or of a congeries of cells or even of separate cells, and never show a distinction into root, stem, and leaf.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). thallogen. Retrieved September 24, 2026, from http://smartdefine.org/thallogen/definitions/2071712 |
| Chicago | Webster's. 2011. "thallogen" http://smartdefine.org/thallogen/definitions/2071712 (accessed September 24, 2026). |
| Harvard | Webster's 2011, thallogen, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/thallogen/definitions/2071712>. |
| MLA | Webster's. "thallogen" 28 May 2011. Web. 24 September 2026. <http://smartdefine.org/thallogen/definitions/2071712> |