direct line of descent within a family; the main branch of a lineage

handed down in a direct line from the founder or master of a school of thought, martial art, or craft; or skill

one's closest blood relatives

(literary) the son of a man's primary wife as opposed to those of a concubine; specifically the eldest son

(archaic) the title used by the children of a concubine to address their father's primary wife

[historical] born of the legal wife rather than a concubine in a polygamous family system

the direct line of descent in a family; children born to a legal wife

(literary) to usurp the position of the legitimate heir to the throne, specifically by a son of a concubine replacing the son of the legal wife

a disciple who has been personally taught or initiated by a master or his official successor

the eldest son born of the primary wife, traditionally considered the legal heir

cousins sharing the same paternal grandfather but different fathers; cousins from the direct family line

the wife of the legal firstborn son or the primary heir in a family

the primary or legitimate wife in a household, as distinguished from concubines

the eldest son born to a man's primary or legal wife in a polygamous system; historically the primary heir to a family line or title