Siamese

noun pl. Si′a·mese′

1. Thai
2. any of a breed of domestic cat, thought to have originated in Siam, with blue eyes and a light-colored coat that is darker on the face, ears, legs, and tail

adjective

1. Thai

2. Etymology: < Siamese twins

   designating or of a pipe coupling or joint in the form of a , for joining two pipes or hoses to one pipe