nonlineal
/ˌnɑnˈlɪniəl/
adjective
- Not directly descended in a straight line from an ancestor; not in a direct line of descent.
- Aunts, uncles, and cousins are nonlineal relatives.
- The family tree includes both lineal descendants and nonlineal branches.
- Inheritance laws sometimes treat lineal and nonlineal heirs differently.
Synonyms