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Webster's New World College Dictionary » Precambrian
Precambrian
Precambrian definition
Pre·cam·brian (prē kam′brē ən)
adjective
designating or of the division of geologic time covering all the time before the Cambrian Period, equivalent to the Archean Eon and the Proterozoic Eon
Precambrian Idioms
the Precambrian
the Precambrian time or its rocks
Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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