Azoic Age, Azoic Era, Azoic Period and Azoic Eon were terms used before 1950 to describe the age of rocks formed before the appearance of life in the geologic sequence. The word "Azoic" is derived from the Greek a- meaning without and zoön meaning animal, it was first used to mean without death.

What does word Archean mean?

1 : of, relating to, or being the earliest eon of geologic history or the corresponding system of rocks — see Geologic Time Table. 2 : precambrian.

Is Azoics a word?

adjective Geology. (formerly) noting or pertaining to the Precambrian Era, especially that part formerly believed to precede the first appearance of life; Archean.