# Oligocene

> English word · Adjective · frequency rank #55,622

## Definitions
1. Of a geologic epoch within the Paleogene period from about 34 to 23 million years ago; marked by the rapid evolution in a warm climate.

## Etymology
From German Oligozän (originally spelt Oligocän, coined in 1854). By surface analysis, oligo- + -cene.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/oligocene