Azoic

a.

1.

Destitute of any vestige of organic life, or at least of animal life; anterior to the existence of animal life; formed when there was no animal life on the globe; as, the azoic. rocks. Azoic age (Geol.) the age preceding the existence of animal life, or anterior to the paleozoic tome. Azoic is also used as a noun, age being understood. See Archæan, and Eozoic.

Adj.

1.

azoic - before the appearance of life; "azoic rocks contain not organic remains"

early, geology