a fee limited to a particular line of heirs; they are not free to sell it or give it away
In common law, fee tail or entail is an estate of inheritance in real property which cannot be sold, devised by will, or otherwise alienated by the owner, but which passes by operation of law to the owner's heirs upon his death. The term fee tail is derived from the Medieval Latin feodum talliatum, which means "cut-short fee.