attrib. and in the genitive. Designating a type of spaniel; (in later use) spec. a small breed of spaniel, having a high, rounded head, short nose, large eyes and long, hanging ears; a dog of this breed, as King Charles spaniel, King Charles’s spaniel, etc.
“King Charles, n.” OED Online. Oxford University Press, June 2017. Web. 27 August 2017.