单词：Hadean
音标：['heidiәn] ；
a. 地狱的, 阴间的
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
s of or relating to or characteristic of Hades or Tartarus
s of or relating to or characteristic of Hades or Tartarus
词型变化：名词复数形式 : hadeans