1. The state of being the firstborn of the same parents; seniority by birth among children of the same family.
2. (Eng. Law)
Defn: The exclusive right of inheritance which belongs to the eldest son. Thus in England the right of inheriting the estate of the father belongs to the eldest son, and in the royal family the eldest son of the sovereign is entitled to the throne by primogeniture. In exceptional cases, among the female children, the crown descends by right of primogeniture to the eldest daughter only and her issue. Blackstone.
PRIMOGENITURESHIP
Pri`mo*gen"i*ture*ship, n.
Defn: The state or privileges of the firstborn. Burke.
PRIMORDIAL Pri*mor"di*al, a. Etym: [L. primordialis, from primordium the first beginning; primus first + ordiri to begin a web, to begin: cf. F. primordial.]
1. First in order; primary; original; of earliest origin; as, primordial condition. "The primordial facts of our intelligent nature." Sir W. Hamilton.
2. (Geol.)
Defn: Of or pertaining to the lowest beds of the Silurian age, corresponding to the Acadian and Potsdam periods in American geology. It is called also Cambrian, and by many geologists is separated from the Silurian.
3. (Biol.)