ultimogeniture

noun

ul·​ti·​mo·​gen·​i·​ture ˌəl-tə-mō-ˈje-nə-ˌchu̇r 

-ni-chər,

-nə-ˌtyu̇r,

-nə-ˌtu̇r

: a system of inheritance by which the youngest child succeeds to the estate

Word History

Etymology

Latin ultimus last + English primogeniture

First Known Use

1882, in the meaning defined above