Archean aeon
ریشه و کاربرد
ریشه
From the Greek 'archaios' meaning 'ancient' and 'aeon' meaning 'age'.
مثال
- The Archean aeon was a time of intense geological activity.
- The first life forms appeared during the Archean aeon.
- Archean aeon rocks are the oldest known on Earth.
ترکیبهای رایج
Archean aeon rocks During the Archean aeon
تعریف انگلیسی
noun
- the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life