Word
Proterozoic, n.
from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
<noun.time>
Proterozoic
Proterozoic aeon
Proterozoic eon
lexical pointers
derivationally related form
proterozoic
semantic pointers
part holonym
Precambrian, Precambrian eon, Precambrian aeon, Precambrian period
instance hypernym
eon, aeon