CN Tower
- a tower in Toronto, Canada, the tallest self-supporting man-made structure in the world when it was completed in 1976. It stands 553 m (1,815 ft) high including a 100 m (328 ft) communications mast.加拿大国家电视塔（位于加拿大多伦多, 1976年建成时为世界最高的人造自承结构, 全高553米, 即1,815英尺, 包括一根100米, 即328英尺高的信号桅）。
词源
CN from Canadian National (Railways).