Meanings
- The mass extinction of the majority of plant and animal species on Earth including all non-avian dinosaurs, which took place 65.5 million years ago marking the end of the Cretaceous period, and is widely accepted as having been caused by an impact event.
Synonyms: K-T extinction event, K, T extinction event
Synonyms & antonyms
nounThe mass extinction of the majority of plant and animal species on Earth including all non-avian dinosaurs, which took place 65.5 million years ago marking the end of the Cretaceous period, and is widely accepted as having been caused by an impact event.
Cite this entry
Cretaceous–Paleogene extinction event. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Cretaceous%E2%80%93Paleogene%20extinction%20event
“Cretaceous–Paleogene extinction event.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Cretaceous%E2%80%93Paleogene%20extinction%20event. Accessed November 5, 2026.
WatkinsX Dictionary, s.v. “Cretaceous–Paleogene extinction event,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Cretaceous%E2%80%93Paleogene%20extinction%20event.
Source: Cretaceous–Paleogene extinction event on Wiktionary, CC BY-SA 4.0.