curly-coated breed of domestic cat (cat, domestic) that has a dense, soft coat lacking any projecting guard hairs, or outer coat. Except on the head, legs, and paws, the coat forms fairly deep waves, or crimps. The eyebrows and whiskers of the Rex cat are crinkled, the eyes are almond-shaped, and the ears are large and high set. The adult Rex cat is slender and usually has long legs, a long neck and head, and a long, tapering tail. Show cats may be any of the colours or patterns that are accepted for domestic cats.