The Collaborative International Dictionary
Postremogeniture
Postremogeniture \Pos*tre`mo*gen"i*ture\ (?; 135), n. [L.
postremus last + genitura birth, geniture.]
The right of the youngest born.
--Mozley & W.
Wiktionary
postremogeniture
n. (l en inheritance Inheritance) by the last-(l en born) (l en child) of the (l en entirety) of, or of a (l en privilege privileged) position in, a (l en parent)’s (l en wealth), (l en estate), or (l en office); (l en ultimogeniture).