of or relating to that part of geological time represented by rocks in which the evidence of life is abundant, comprising the Palaeozoic, Mesozoic, and Cenozoic eras
noun
2. the Phanerozoic
Compare Cryptozoic
Phanerozoic in American English
(ˌfænərəˈzoʊɪk)
adjective
[sometimesp-]
designating or of the geologic eon usually subdivided into the Paleozoic, Mesozoic, and Cenozoic eras