Dictionary
Precambrian
adjective Pre·cam·bri·an \(ˌ)prē-ˈkam-brē-ən, -ˈkām-\
Definition of PRECAMBRIAN
: of, relating to, or being the earliest era of geological history or the corresponding system of rocks that is characterized especially by the appearance of single-celled organisms and is equivalent to the Archean and Proterozoic eons — see geologic time table
— Precambrian noun
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First Known Use of PRECAMBRIAN
1864
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