\E`o*zo"["o]n\, n.; pl. {Eozo["o]ns}, L. {Eozoa}. [NL.,
fr. Gr. 'hw`s dawn + zw^,on an animal.] (Paleon.)
A peculiar structure found in the Arch[ae]an limestones of
Canada and other regions. By some geologists it is believed
to be a species of gigantic Foraminifera, but others consider
it a concretion, without organic structure.