There isn't one specific geological name for "ice age" as a whole. However, the term "ice age" refers to a period of long-term reduction in the temperature of the Earth's surface and atmosphere, resulting in the expansion of ice sheets and glaciers.

Here's a breakdown of how geologists use terminology:

* "Ice Age" (with a capital "A"): This generally refers to the Quaternary Glaciation, a period of glacial expansion and retreat that began about 2.6 million years ago and continues today. This is the most recent ice age, and it's characterized by alternating glacial and interglacial periods.

* "Glacial Period" or "Glaciation": These terms refer to specific periods within an ice age where glaciers are expanding.

* "Interglacial Period": These are periods of warmer temperatures within an ice age when glaciers retreat.

So, while there isn't a single name for the entire ice age, "Quaternary Glaciation" is the most widely used term to refer to the current ice age.