phanerozoic : Idioms & Phrases
phanerozoic aeon
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noun the period from about 5,400 million years ago until the present
Phanerozoic; Phanerozoic aeon.
WordNet
phanerozoic eon
-
noun the period from about 5,400 million years ago until the present
Phanerozoic; Phanerozoic aeon.