nephionic
/ˌnɛfi.əˈnɪk/ (NEF-i-uh-NIK)
Definitions
1. noun
Relating to or characteristic of the children of one’s siblings.
“The nephionic relationship was a complex one to navigate.”
2. adjective
Describing or pertaining to the nephion, a supposed entity in mythology.
“The fantasy novel featured nephionic powers that were both alluring and terrifying.”