Odal

 Among the early and medieval Teutonic peoples, esp. Scandinavians, the heritable land held by the various odalmen constituting a family or kindred of freeborn tribesmen; also, the ownership of such land. The odal was subject only to certain rights of the family or kindred in restricting the freedom of transfer or sale and giving certain rights of redemption in case of change of ownership by inheritance, etc., and perhaps to other rights of the kindred or the tribe. Survivals of the early odal estates and tenure exist in Orkney and Shetland, where it is usually called by the variant form udal.  [Webster 1913 Suppl.]

 Noting, or pert. to, odal land or ownership.  [Webster 1913 Suppl.]