a.

1. 冰的；冰狀的
2. 冰河的；冰河時代的
   Two thirds of the continent was covered in ice during glacial periods.

   該大陸的三分之二地區在冰河時代被冰覆蓋著。

3. 冰冷的；冷淡的
   She gave me a glacial smile.

   她對我冷冷地一笑。

adj.

1. relating to ice, especially in the form of glaciers.
2. extremely cold.
   ▸unfriendly or unemotional.
3. Chemistry  denoting pure organic acids (especially acetic acid) which form ice-like crystals on freezing.

n.