环




环可能指：




  • 數學方面的「環」:


    • 环 (代数)，一种代数结构。


    • 環 (圖論)，一個圖論概念。


    • 環圈，拓撲空間中會回到起點的函數。




  • 形狀方面的「環」：


    • 环形，一种二维平面几何图形。


    • 环面，轮胎状几何体表面。




  • 化學結構中的「環」：


    • 环 (蛋白质)，一种蛋白质的二级结构。


    • 环 (核酸)，核酸结构中的单链区。




  • 天文方面的：

    • 行星環，環繞在行星周圍的塵埃碎屑等。


  • 其他方面的「環」：


    • 手环、脚环，一种用玉或金属制作的首饰。


    • 環 (粵語)，指一個地方，著重表示其佔有的面積。著名的地方有香港的中環和澳門的黑沙環。

      • 環頭：香港用語，初時指四環中的土地，後來為香港警察所用，指警署在城市負責的範圍。



    • 環 (小說)，倪匡的一部科幻小說。





參見



  • 以「环」開頭的條目

  • 以「環」開頭的條目













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