There is no established definition for "ethnogenicity." It's possible that you might have encountered this term in an informal context or a specific subculture, but it lacks a formal definition and usage in mainstream discourse.
If you're interested in exploring similar concepts, you might consider looking into terms like:
* Ethnogenesis: The process by which a distinct ethnic group is formed.
* Ethnic identity: The sense of belonging to a particular ethnic group.
* Ethnic affiliation: The degree to which individuals feel a sense of belonging to a particular ethnic group.
It's important to remember that language is constantly evolving. If you have encountered this term in a specific context, it's helpful to consider the source and the surrounding information to understand its intended meaning.