noun
Paleocene epoch
Geological term for the epoch from about 66 to 56 million years ago, immediately following the Cretaceous–Paleogene extinction event.
暁新世は新生代の最初の世である。
The Paleocene is the first epoch of the Cenozoic Era.
The kanji 暁 (dawn), 新 (new), and 世 (world/epoch) together convey 'dawn of a new world', reflecting the recovery and diversification of life after the mass extinction. The reading ぎょうしんせい is the on'yomi compound.