Word Study
phanerozoic aeon
WORDNET DICTIONARY
Noun phanerozoic aeon has 1 sense
- phanerozoic aeon(n = noun.time) phanerozoic, phanerozoic eon - the period from about 5,400 million years ago until the present; Array has parts: age of mammals, cenozoic, cenozoic era
is a kind of aeon, eon
For further exploring for "phanerozoic aeon" in Webster Dictionary Online