Pro Indiviso
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
As undivided; in common. The joint occupation or possession of lands. Thus, lands held by coparceners are held pro indiviso; that is, they are held undividedly, neither party being entitled to any specific portions of the land so held, but both or all having a joint interest in the undivided whole.
Cowell.