螺線

螺線（spiral）是指一些圍著某些定點或軸旋轉且不斷收縮或擴展的曲線。

**二維螺線**
 費馬螺線- 等角螺線- 雙曲螺線- 圓內螺線- 阿基米德螺線- 連鎖螺線- 柯奴螺線- 歐拉螺線

**三維螺線**
 螺線管

**參考文獻**
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