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Definitions from WordNet

Definitions from the Web

Archaean

Part of Speech:

Noun, Adjective

Senses:

Noun:

1. A member of the group of ancient rocks or the geological era between 4,000 and 2,500 million years ago.

2. Any organism belonging to the group of single-celled microorganisms that lived during the Archean era.

Adjective:

1. Relating to or characteristic of the Archaean era or the ancient rocks formed during it.

Usages:

Noun:

The study of Archaean geology provides insights into the Earth's early history.

These archaean organisms thrived in extreme environments.

Adjective:

An archaean rock formation was discovered in the remote region.

The Archaean era witnessed significant geological transformations.