Pleistocene (noun)

1. The Pleistocene Epoch is the geologic epoch that lasted from about 2,588,000 to 11,700 years ago.
2. Pleistocene is a geological epoch in the Quaternary period that began 2.6 million years ago and lasted until around 11,700 years ago.

Origin:

The term "pleistocene" is derived from the greek words "pleistos" (meaning "most") and "kainos" (meaning "new").

Examples:

1. The Pleistocene is also known as the Ice Age.
2. During the Pleistocene, the earth's climate was much colder than it is today.
3. Many of the large mammals that roamed the earth during the Pleistocene are now extinct.
4. The Pleistocene was a time of significant environmental change.
5. The Pleistocene Epoch is significant for the development of human civilization as it saw the emergence of Homo genus.