reversion

n. 返回(原状,旧习惯),逆转

A reversion to a former type or ancestral characteristic.

返祖恢复到从前的类型或祖先的特征

Reversion of land held under feudal tenure to the manor in the absence of legal heirs or claimants.

无继承人的土地规领主缺少法定继承人或继承申请者的封地的所有权的转归领主