Proterozoic
Part of speech: adjective
Definition: Of, or relating to the geologic eon from about 2,500 to 570 million years ago; comprises the Paleoproterozoic, Mesoproterozoic and Neoproterozoic eras; marked by the build up of oxygen in the atmosphere and the emergence of primitive multicellular life.
Part of speech: proper noun
Definition: The Proterozoic eon.
Early
Part of speech: adjective
Definition: At a time in advance of the usual or expected event.Arriving a time before expected; sooner than on-time.Near the start or beginning.
Part of speech: adverb
Definition: At a time before expected; sooner than usual.
Example sentence: It gets late early out there.