King Charles spaniel n 1: a toy English spaniel with a black-and-tan coat; named after Charles II who popularized it
King Charles spaniel \King Charles span"iel\n. (Zool.) A variety of small pet dogs, having, drooping ears, a high, dome-shaped forehead, pug nose, large, prominent eyes, and long, wavy hair. The color is usually black and tan. [1913 Webster]