primogeniture

1. (countable) An instance of such a right of inheritance, established by custom or law.Examples: "The King of Sardinia, by a decree of the 9th of Dec. has abolished— 1. The prohibition against the erection of primogenitures and feudal rights, enacted by the 9th section of the edict of the 29th of July 1797, or by any other law; restricting, however, to those primogenitures and majorats only which shall be erected in favour of persons[…]."; "All primogenitures, trusts, rights of presentation, and every other description of entail on real property, movables, or fixtures, rents, annuities, seigneuries, or of any other kind whatsoever, are suppressed, which are from henceforward restored to the class of absolutely free."; "The American system of land tenures, the abolition of entails and primogenitures, and our methods of transfer of real estate, are all anti-English in their origin."countable