Phanerozoic Definition
 fănər-ə-zōĭk 
    adjective
  
 Designating or of the geologic eon usually subdivided into the Paleozoic, Mesozoic, and Cenozoic eras.
 Webster's New World 
    noun
  
 The Phanerozoic Eon.
 American Heritage 
Synonyms: 
  
- Phanerozoic aeon
- Phanerozoic eon
Idioms, Phrasal Verbs Related to Phanerozoic
- the Phanerozoic
Origin of Phanerozoic
-  Greek phaneros visible (from phainein to cause to appear bhā-1 in Indo-European roots) –zoic From American Heritage Dictionary of the English Language, 5th Edition 
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