Belgian Tervuren, breed of medium-sized working dog perfected in Belgium in the early 20th cent. It stands from 22 to 26 in. (55.9-66 cm) high at the shoulder and weighs from 50 to 60 lb (22.6-27.2 kg). Its long, straight, dense coat may vary in shade from fawn to russet mahogany; the hair tips are always black. Developed from a widely interbred stock of Belgian sheepherding dogs, the Tervuren emerged as one of several distinct varieties, differing from the Groenendael Belgian sheepdog in color only. It is a relatively rare breed in the United States today. See dog.