Pleistocene

American  

[plahy-stuh-seen] / ˈplaɪ stəˌsin /

adjective

1. noting or pertaining to the epoch forming the earlier half of the Quaternary Period, beginning about two million years ago and ending 10,000 years ago, characterized by widespread glacial ice and the advent of modern humans.

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noun

1. the Pleistocene Epoch or Series.

Pleistocene British  

/ ˈplaɪstəˌsiːn /

adjective

1. of, denoting, or formed in the first epoch of the Quaternary period, which lasted for about 1 600 000 years. It was characterized by extensive glaciations of the N hemisphere and the evolutionary development of man

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noun

1. the Pleistocene epoch or rock series

Pleistocene Scientific  

/ plī′stə-sēn′ /

1. The earlier of the two epochs of the Quaternary Period, from about 2 million to 10,000 years ago. The Pleistocene Epoch was characterized by the formation of widespread glaciers in the Northern Hemisphere and by the appearance of humans. Mammals included both small forms, such as saber-toothed tigers and horses and giant ones, such as mammoths and mastodons. Almost all the giant mammals, including woolly mammoths, giant wolves, giant ground sloths, and massive wombats disappeared at the end of the Pleistocene and the start of the Holocene.

2. See Chart at geologic time

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Other Word Forms

• post-Pleistocene
  adjective

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Etymology

Origin of Pleistocene

First recorded in 1830–40; from Greek pleîsto(s) “most” (superlative of polýs “much”) + -cene

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Example Sentences

See Examples For:

Pleistocene

Researchers believe the giant herbivores roamed during the Pleistocene epoch, spanning from 2.5 million years ago until their extinction about 11,700 years ago.

From Los Angeles Times ● Sep. 10, 2026

Their slim bodies and long front legs may have helped them travel efficiently through the open landscapes of Pleistocene North America.

From Science Daily ● Sep. 8, 2026

The lush greenery in the leafy inner courtyard will be replaced with plants more closely related to those of the late Pleistocene, such as cypress and toyon.

From Los Angeles Times ● Jun. 6, 2026

Researchers classify Vasuki indicus within the madtsoiidae family, a group of snakes that existed for nearly 100 million years, from the Late Cretaceous to the Late Pleistocene.

From Science Daily ● Apr. 29, 2026

The bureau dispatched William Henry Holmes to scrutinize the case for Pleistocene proto-Indians.

From "1491" by Charles C. Mann

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