noun · the direct line of descent or blood relation

只有王家的嫡系后代才有资格继承这份遗产。

noun · a school or faction that faithfully preserves and transmits a master's doctrine

他被公认为该学术流派的嫡系传人。

noun · a faction or military unit under the direct and personal control of a leader

将军只信任由他亲手训练出的嫡系部队。