Precambrian

or Pre-Cam·bri·an

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

/ priˈkæm bri ən, -ˈkeɪm- /

Geology

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.

Origin of Precambrian

First recorded in 1860–65; pre- + Cambrian

Words nearby Precambrian

Preble, preboard, prebuttal, prec., precalculus, Precambrian, precancel, precancer, precancerous, precapillary, precariat

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for Precambrian

A few explanatory remarks concerning the mode of detection of Precambrian rocks may not be amiss.
The Principles of Stratigraphical Geology|J. E. Marr
We may take our own country as a region where a good development of the Precambrian rocks occurs.
The Principles of Stratigraphical Geology|J. E. Marr
These Torridonian strata furnish us with the most satisfactory group of Precambrian sediments yet detected in Britain.
The Principles of Stratigraphical Geology|J. E. Marr

British Dictionary definitions for Precambrian

Precambrian

Pre-Cambrian

/ (priːˈkæmbrɪən) /

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 eraSee Archaeozoic, Proterozoic

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for Precambrian

Precambrian

[ prē-kăm′brē-ən, -kām′- ]

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.

单词	precambrian
释义	Precambrian or Pre-Cam·bri·an [ pree-kam-bree-uhn, -keym- ] / priˈkæm bri ən, -ˈkeɪm- / Geology 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. Origin of Precambrian First recorded in 1860–65; pre- + Cambrian Words nearby Precambrian Preble, preboard, prebuttal, prec., precalculus, Precambrian, precancel, precancer, precancerous, precapillary, precariat Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for Precambrian A few explanatory remarks concerning the mode of detection of Precambrian rocks may not be amiss. The Principles of Stratigraphical Geology\|J. E. Marr We may take our own country as a region where a good development of the Precambrian rocks occurs. The Principles of Stratigraphical Geology\|J. E. Marr These Torridonian strata furnish us with the most satisfactory group of Precambrian sediments yet detected in Britain. The Principles of Stratigraphical Geology\|J. E. Marr British Dictionary definitions for Precambrian Precambrian Pre-Cambrian / (priːˈkæmbrɪən) / 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 eraSee Archaeozoic, Proterozoic Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for Precambrian Precambrian [ prē-kăm′brē-ən, -kām′- ] 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. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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