Antonyms for archean
ɑrˈki ənarchean

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1. Archean, Archean eon, Archean aeon, Archeozoic, Archaeozoic, Archeozoic eon, Archaeozoic aeonadjective

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

   Antonyms:
   middle, late

2. archean, archaeanadjective

   of or relating to the earliest known rocks formed during the Precambrian Eon

   Antonyms:
   middle, late

   Synonyms:
   archaean

How to use archean in a sentence?

1. Hilairy Hartnett:

   The theory of the purple planet is really intriguing, and it's intriguing because it's important for us to think about the fact that we might not be looking for life that looks like life on the modern Earth, we might be looking for life that looks like Earth in the Archean (era of early life), or we might be looking for life that looks like Earth life that lives way at the bottom of the ocean. And we have to think about what that's going to look like. If it uses retinal pigments, it'll be purple.

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