former name of Thailand (def 1).
Gulf of, Thailand (def 2).
the former name (until 1939 and 1945–49) of Thailand
Gulf of Siam, an arm of the South China Sea between the Malay Peninsula and Indochina the former name of (the Gulf of) Thailand (sense 2)


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  • Siamang

    noun 1. a large, black gibbon, Hylobates syndactylus, of Sumatra and the Malay Peninsula, having very long arms and the second and third digits partially united by a web of skin: an endangered species. noun 1. a large black gibbon, Hylobates (or Symphalangus) syndactylus, of Sumatra and the Malay Peninsula, having a large reddish-brown vocal […]

  • Siamese

    adjective 1. of or relating to Siam, its people, or their language. 2. Thai (def 3). 3. twin; closely connected; similar. 4. Informal. dual; combined; twofold or two-way: a Siamese sprinkler. noun, plural Siamese. 5. a native of Siam. 6. Thai (def 2). 7. Siamese cat. 8. (usually lowercase) a standpipe placed outside a building […]

  • Siamese-cat

    noun 1. one of a breed of slender, short-haired cats, raised originally in Siam, having a fawn or grayish body with extremities of a darker shade of the same color. noun 1. a short-haired breed of cat with a tapering tail, blue eyes, and dark ears, mask, tail, and paws

  • Siamese-fighting-fish

    noun 1. a labyrinth fish, Betta splendens, that has been bred for centuries to develop brilliant coloration, very long fins, and pugnacity. Siamese fighting fish noun 1. a brightly coloured labyrinth fish, Betta splendens, of Thailand and Malaysia, having large sail-like fins: the males are very pugnacious

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