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The Collaborative International Dictionary
Hypozoic

Hypozoic \Hy`po*zo"ic\, a. [Pref. hypo- + Gr. zo^,on an animal.] (Geol.) Anterior in age to the lowest rocks which contain organic remains.
--Lyell.

Wiktionary
hypozoic

a. (context geology English) older than the lowest rocks which contain organic remains