Sturdy breed of toy dog , known since the 17th century.
Standing 10 in. (26 cm) high or less and weighing 7–8 lbs (3–3.5 kg), it is a terrier -like dog with small, erect ears, round black eyes, and a short, docked tail. Its wiry, preferably black coat is short on parts of the body but longer on the legs and face, where it produces the monkeylike expression for which the breed is named (from German Affe , "ape").