[1] : WordNet (r) 2.0

hadean time
     n : the earliest eon in the history of the earth from the first
         accretion of planetary material around 4,600 million
         years ago until the date of the oldest known rocks
         about 3,800 million years ago; no evidence of life
         syn: hadean, hadean eon, hadean aeon, priscoan,
         priscoan eon, priscoan aeon
see also:
hadean hadean eon hadean aeon priscoan priscoan eon priscoan aeon 

Hadean >> H Words
Hadean, definition of term: Hadean
hadean_pag1.html

Geologic Time >> G Words
Geologic Time, definition of term: Geologic Time
geologic+time_pag1.html

Free Time >> F Words
Free Time, definition of term: Free Time
free+time_pag1.html

Common Time >> C Words
Common Time, definition of term: Common Time
common+time_pag1.html

Big Time >> B Words
Big Time, definition of term: Big Time
big+time_pag1.html

Access Time >> A Words
Access Time, definition of term: Access Time
access+time_pag1.html

At A Time >> A Words
At A Time, definition of term: At A Time
at+a+time_pag1.html

From Time To Ti >> F Words
From Time To Ti, definition of term: From Time To Ti
from+time+to+ti_pag1.html