Where does “leptonium” come from?

leptonium (English) comes from English lepton, from Ancient Greek λεπτόν, from Ancient Greek λεπτός, from Ancient Greek -τός, from Proto-Indo-European -tós — Creates verbal adjectives from verb stems.

leptonium (English): A bound pair of a lepton and its antiparticle

Definitions

  1. A bound pair of a lepton and its antiparticle

Ancestry of “leptonium”, step by step

leptonium traces back through two separate lines of ancestry.

via English lepton

StepLanguageWordMeaning
1EnglishleptonA coin used since ancient times in Greece,...
2Ancient Greekλεπτόνneuter nominative singular of λεπτός; neuter...
3Ancient Greekλεπτόςpeeled, husked; fine-grained; thin, lean
4Ancient Greek-τόςcreates verbal adjectives of possibility, either...
5Proto-Indo-European-tósCreates verbal adjectives from verb stems

via English onium

StepLanguageWordMeaning
1Englishoniumany cation derived by the addition of a proton to...
2EnglishammoniumThe univalent NH cation, derived by the...
3New Latinammōnium
Every word from Proto-Indo-European -tósEvery word from Ancient Greek -τόςEvery word from Ancient Greek λεπτός