glaciation
🇺🇸
/ˌɡleɪʃiˈeɪʃn/
🇬🇧
/ˌɡleɪsiˈeɪʃn/
The process where glaciers cover land, making it icy and cold.
During the last glaciation, huge areas of the Earth were covered in ice.
最後の氷河期には、地球の広大な地域が氷に覆われていた。