Dim non fuit compos mentis
Defined in 1 dictionary — Black's (1910)
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
The name of a writ which the heirs of a person who was non cornos mentis, and who aliened his lands, might ave sued out to restore him to his rights. Abolished by 3 & 4 Wm. IV. c. 27.
Defined under Dum in Black's Law Dictionary.