Any one of numerous species of small freshwater American cyprinoid fishes, belonging to Notropis, or Minnilus, and allied genera; as the redfin (Notropis megalops), and the golden shiner (Notemigonus chrysoleucus) of the Eastern United States; also loosely applied to various other silvery fishes, as the dollar fish, or horsefish, menhaden, moonfish, sailor's choice, and the sparada.