Precambrian

or �ʰ��-�䲹��·��·��

[ pree-kam-bree-uhn, -keym- ]

Phonetic (Standard)IPA

adjective

noting or pertaining to the earliest era of earth history, ending 570 million years ago, during which the earth's crust formed and life first appeared in the seas.

noun

the Precambrian Era.

Precambrian

/ ��ːˈ��æ��ɪə�� /

adjective

of, denoting, or formed in the earliest geological era, which lasted for about 4 000 000 000 years before the Cambrian period

noun

the Precambrian
the Precambrian era See Archaeozoic Proterozoic

Precambrian

The period of geologic time between Hadean Time and the Phanerozoic Eon, from about 3.8 billion to 540 million years ago. During the Precambrian Eon, which is divided into the Archean and Proterozoic, primitive forms of life first appeared on Earth.
See Chart at geologic time

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Word History and Origins

Origin of Precambrian¹

First recorded in 1860–65; pre- + Cambrian

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Example Sentences

Examples have not been reviewed.

But it wasn't till the Precambrian extinction 544 million years ago that they burst through their previous limits, generating new species that found new ways to live.

From

They argued the cuts would cripple studies of museum collections holding some 5 million items, including a renowned trove of Precambrian fossils.

From

The results were published in the journal Precambrian Research.

From

In addition, because Precambrian biomarker records are extremely sensitive to contamination, the researchers used an ultra-clean method to extract organic matter from sediment cores.

From

The landscape had started to change, and here and there amongst the green were slashes of black where the Precambrian rock grafted sharp hills and cut into craggy cliffs.

From

precalculus precancel

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