Definition from Wiktionary, the free dictionary
Alternative forms 
- Rhymes: -əʊɪk
Cenozoic (not comparable)
of a geological era from 65 million years ago to present
- (geology) A geologic era within the Phanerozoic eon comprising the Paleogene and Neogene periods from about 65 million years ago to the present, when the continents moved to their current position and modern plants and animals evolved.