Origin: French suffix -age
Ice age has 3 different meanings across 1 category:
any period of time during which glaciers covered a large part of the earth's surface
"the most recent ice age was during the Pleistocene"
A period of long-term reduction in the temperature of Earth's surface and atmosphere, resulting in the presence of major polar ice sheets that reach the ocean and calve icebergs.
Alternative letter-case form of ice age