Eozoic

[ ee-uh-zoh-ik ]

/ ˌi əˈzoʊ ɪk /

(formerly) noting or pertaining to the Precambrian Era, especially the period including the beginnings of animal life.

Origin of Eozoic

First recorded in 1875–80; eo- + zo- + -ic

In his system the greater divisions of the history were “Times:” thus the Eozoic was a time and the Palozoic was a time.

The Story of the Earth and Man |J. W. Dawson
Another problem is that of means of subsistence for the Eozoic Foraminifera.

The Story of the Earth and Man |J. W. Dawson
In the oldest rocks known to geologists—those of the Eozoic time—some indications of the presence of life are found.

Facts and fancies in modern science |John William Dawson
The English chalk and the chalky modern mud of the Atlantic sea-bed, are precisely similar in origin to the Eozoic limestones.

The Story of the Earth and Man |J. W. Dawson

In it the forms of animal and plant life that had been becoming more numerous and varied from the Eozoic onward, culminated.

The Story of the Earth and Man |J. W. Dawson

Eozoic

/ (ˌiːəʊˈzəʊɪk) /

archaic of or formed in the part of the Precambrian era, during which life first appeared