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

First Known Use of precambrian

1864

in the meaning defined above

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