breed of sporting terrier known for its alert and gregarious charm and expressively drooped ears; coat is hard, wiry, and straight and has a definite undercoat; coat may be any shade of red, wheaten, grizzle, black, or tan; ears are small and velvety to the touch; tail is straight, slightly docked, and is carried high; eyes are dark in color; adult stands 10 in. (25 cm) tall at shoulders and weighs 11–12 lbs (about 5 kg); originated in Great Britain; also called Jones terrier after Frank Jones, who sold many of these terriers to American sportsmen visiting England.