EOZOIC

E`o*zo"ic, a. Etym: [See Eozoön.] (Geol.)

Definition: Of or pertaining to rocks or strata older than the Paleozoic, in many of which the eozoön has been found.

Note: This term has been proposed for the strata formerly called Azoic, and is preferred especially by those geologists who regard the eozoön as of organic origin. See Archæan.

Source: Webster’s Unabridged Dictionary 1913 Edition