mythologem
/ˌmɪθə(ʊ)ˈləʊdʒəm/ /mɪˈθɒlədʒəm/noun
A mythical story; a fundamental theme or motif of myth or other discourse.
Origin
Late 19th century; earliest use found in Journal of Hellenic Studies. From ancient Greek μυθολόγημα mythical narrative from μυθολογεῖν to tell mythical tales + -ημα, suffix forming nouns.