Meaning of the word "Glacial period" in English

What does "Glacial period" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

Glacial period

US /ˈɡleɪ.ʃəl ˈpɪr.i.əd/
UK /ˈɡleɪ.ʃəl ˈpɪə.ri.əd/

Noun

a period of time during which glaciers were much more extensive than they are today, especially the last glacial period

Example:
During the last glacial period, much of North America was covered by ice sheets.
Scientists study ancient ice cores to understand past glacial periods.