primordial

/praɪˈmɔːr.di.əl/

形容词

（从）太古时代存在的，原始的
The planet Jupiter contains large amounts of the primordial gas and dust out of which the solar system was formed.
木星含有大量的原始气体和尘埃，太阳系就是由这些气体和尘埃形成的。