Meaning

• A glacial period (colloquially known as an ice age).

Meaning

• Of, or relating to glaciers.

  "Wang Shijin is a glacier expert and director of the Yulong Snow Mountain Glacial and Environmental Observation Research Station."

• Very slow.

• Cold and icy.

  "After the rain and frost, the pavements were glacial."

• Having the appearance of ice.

  "On cold days, glacial acetic acid will freeze in the bottle."

• Cool and unfriendly.

  "He gave me a glacial stare."