C2 noun /ˌpraɪmoʊˈdʒɛnɪtʃər/
primogeniture
長子継承権
Meaning
The right of the firstborn child to inherit the family estate or title.
Example
Under primogeniture, the eldest son inherited the entire estate.
長子継承権の下、長男は家族全体の財産を相続しました。