/'gleɪsɪəl; [US] 'gleɪʃl; `ˇleʃəl/
adj
1 (geology 地质)
(a) of the Ice Age 冰期的; 冰川期的; 冰河时代的; 冰河期的
*the glacial era/epoch/period, ie the time when much of the northern hemisphere was covered by ice 冰期（亦称｀冰川期＇、｀冰河时代＇或｀冰河期＇）.
(b) caused by glaciers 冰川造成的
*glacial deposits, ie rocks deposited by a moving glacier 冰川沉积
* glacial flow, ie movement of a glacier 冰川运动.
2 very cold; like ice 寒冷的; 冰冷的
*glacial winds, temperatures, etc 寒风、低温
* the glacial waters of the Arctic 北极寒冷的水域.
3 (fig 比喻) icy in manner; showing no sign of human emotion 冷若冰霜的; 不流露情感的
*a glacial smile, manner, silence 冷冷的微笑、举止、沉默
* glacial indifference, politeness 冷漠、冷淡的礼貌.

adj
[Date: 1600-1700; Language: Latin;Origin: glacialis, from glacies 'ice']
relating to ice and glaciers, or formed by glaciers
　a glacial valley
　glacial deposits
a glacial look or expression is extremely unfriendly
= icy
extremely slow
　Change was coming, but at a glacial pace.
extremely cold
= icy
　a glacial wind
>glaciallyadv