嫡 (w)

(dí) first wife; son of first wife

嫡传 (w)

(díchuán) handed down in a direct line from the founder

嫡子 (w)

(dízǐ) son of first wife

嫡系 (w)

(díxì) direct line of descent; under one's personal command; school or faction passing on faithfully one's doctrine

嫡亲 (w)

(díqīn) closely related by blood