Estate Tail
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
QUASI.
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.