Sentence:  Stilts and Shadow , on Pam 's bed , appeared to be one cat - rather large , as <WSD>Siamese</WSD> cats go , and , to be sure , having two heads and two tails . 
Meaning of the word marked with <WSD> tags:  a slender short-haired blue-eyed breed of cat having a pale coat with dark ears paws face and tail tip