any of a breed of small terrier with short legs, a long, white, bristly coat, a squarish muzzle, and a docked, upright tail
See Sealyham terrier in American Heritage Dictionary 4
(sēˈlē-hămˌ, -lē-əm)
noun
A terrier of a breed developed in Wales, having a wiry white coat with brownish markings on the head and ears, a long head, powerful jaws, and short legs.