دیکشنری فارسی

Archean eon

ریشه و کاربرد

ریشه

From the Greek 'archaios' meaning 'ancient' and 'eon' meaning 'age'.

مثال

  • The Archean eon was a time of intense geological activity.
  • The first life forms appeared during the Archean eon.
  • Archean eon rocks are the oldest known on Earth.

ترکیب‌های رایج

Archean eon rocks During the Archean eon

تعریف انگلیسی

noun
  1. the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life

همین دیکشنری روی گوشی

همهٔ ۲۹۱٬۲۱۲ واژه، بدون نیاز به اینترنت.

دریافت اپلیکیشن