Word Study
phanerozoic
WORDNET DICTIONARY
Noun phanerozoic has 1 sense
- phanerozoic(n = noun.time) phanerozoic aeon, 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" in Webster Dictionary Online