spiral
英 ['spa?r(?)l]
美['spa?r?l]
- n. 螺旋；旋涡；螺旋形之物
- adj. 螺旋形的；盘旋的
- vt. 使成螺旋形；使作螺旋形上升
- vi. 盘旋；成螺旋形；螺旋形上升（过去式spiraled/spiralled，过去分词spiraled/spiralled，现在分词spiraling/spiralling，第三人称单数spirals，副词spirally）
英英释意
- 1. a plane curve traced by a point circling about the center but at ever-greater distances from it
- 2. a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle
- 3. ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center
- 4. a structure consisting of something wound in a continuous series of loops;
- "a coil of rope"
- 5. flying downward in a helical path with a large radius