ˌrāsnəˈlēəs, rāˈsnu̇lē-; ˌrēznəˈlīəs, rēzˈnəlēəs noun
Etymology: Late Latin, literally, thing of no one
1. : a thing belonging to no one whether because never appropriated (as a wild animal) or because abandoned by its owner but acquirable by appropriation
2. : property not subject to private ownership under Roman law