English
thallogen
From thallo- + -gen.
Today it means
noun Any of a large number of plants that consist of a thallus only, with no flower, leaves etc.
Sources
Sources: Wiktionary, “thallogen”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / thallogen