Archaean
1 Britishadjective
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of or relating to the highly metamorphosed rocks formed in the early Precambrian era
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the earlier of two divisions of the Precambrian era, during which the earliest forms of life are assumed to have appeared
noun
Vocabulary lists containing archaean
Earth Science - High School
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Geology - High School
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
There are four different types of Archaean cell walls.
From Textbooks • Jun. 9, 2022
Archaean cell walls do not have peptidoglycan, but they may have pseudopeptidoglycan, polysaccharides, glycoproteins, or protein-based cell walls.
From Textbooks • Jun. 9, 2022
The team concluded that if the biggest imprints in the Ventersdorp rock were formed by the largest raindrops, air pressure in the Archaean could have been no more than twice what it is today.
From BBC • Dec. 4, 2012
This "palaeobarometry" approach, revealed at the , will help constrain the models that try to simulate conditions in Archaean times.
From BBC • Dec. 4, 2012
They appear in contact with Archaean, Algonkian or early Palaeozoic rocks.
From The Birth-Time of the World and Other Scientific Essays by Joly, John
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
