The story
From [Term?] + -onium (“quaternary ammonium compound”).
Etymology from Wiktionary, CC BY-SA 4.0.
mebezonium
Today it means: A neuromuscular blocker, 4,4’-diaminodicyclohexyl methane trimethylammonium iodide, used in veterinary medicine, in combination with the embutramide and tetracaine, for euthanasia of small domestic animals. Full definition →