Belgian Tervuren (təvûrn´), 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.