Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun phanerozoic_aeon

1 sense of phanerozoic aeon

Sense 1
Phanerozoic, Phanerozoic eon, Phanerozoic aeon -- (the period from about 5,400 million years ago until the present)
       INSTANCE OF=> eon, aeon -- (the longest division of geological time)