noun
approximately the last 63 million years
• Syn: ↑Cenozoic, ↑Age of Mammals
• Instance Hypernyms: ↑era, ↑geological era
• Part Holonyms: ↑Phanerozoic, ↑Phanerozoic eon, ↑Phanerozoic aeon
• Part Meronyms: ↑Quaternary, ↑Quaternary period, ↑Age of Man, ↑Tertiary, ↑Tertiary period
Useful english dictionary. 2012.