Quasi-estate tail
Defined in 2 dictionaries — Ballentine's (1916), Black's (1910)
Ballentine's Law Dictionary
James A. Ballentine · 1916
An estate tail of less than a fee, e. g., an estate tail pur autre vie.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
When a tenant for life grants his estate to a man and his heirs, as these words, though apt and proper to create an estate tail, cannot do so, because the grantor, being only tenant for life, cannot grant in perpetuum, therefore they are said to create an estate tail quasi or improper. Brown.