switchback
/ˈswɪtʃbæk/noun
1
- Brit. a road, path, or railway with alternate sharp ascents and descents〈英〉时起时伏的道路（或铁路）。
1.1
- a roller coaster（游乐场中的）环滑车。
2
- N. Amer. a 180° bend in a road or path, especially one leading up the side of a mountain〈北美〉（尤指上山坡的）公路（或道路）上的180°转弯。