Astitrarius Haeres
Defined in 3 dictionaries — Cyclopedic (1922), Ballentine's (1916), Black's (1891)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
An heir apparent who hath been, by conveyance of his ancestors, placed in a dwelling house in the ancestor's lifetime. Co. Litt. 8.
Ballentine's Law Dictionary
James A. Ballentine · 1916
An heir in possession.
A Dictionary of Law
Henry Campbell Black · 1891
An heir apparent who has been placed, by conveyance,; in possession of his ancestor's estate during such atcestor’s life-time, Co. Litt. 8.