adj.
Pronunciation: ( ˌ )pr ē - ' kam-br ē - ə n, - ' k ā m-
Function: adjective
Date: 1864
: 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