A more thorough explanation:

Definition: Abavia (pronounced "uh-BAY-vee-uh") is a Latin term used in civil law to refer to a person's great-great-great-grandmother.

For example, if you are talking about your family tree and you want to refer to your great-great-great-grandmother on your mother's side, you would use the term "abavia."

Another example would be if you were researching your family history and came across a document that mentioned your abavia by name.

These examples illustrate how the term abavia is used to refer specifically to a person's great-great-great-grandmother in the context of civil law and genealogy.