Where does “эонотема” come from?

эонотема (Russian) comes from Ancient Greek θέμα, from Ancient Greek τίθημι, from Proto-Indo-European dʰeh₁- — to do, put, place.

Ancestry of “эонотема”, step by step

StepLanguageWordMeaning
1Ancient GreekθέμαThat which is placed or laid down; Something...
2Ancient GreekτίθημιI put, place, set; I make, cause to be; I make
3Proto-Indo-Europeandʰeh₁-to do, put, place
Every word from Proto-Indo-European dʰeh₁- →Every word from Ancient Greek τίθημι →Every word from Ancient Greek θέμα →