eozoon

1 definition found

eozoon - Collaborative International Dictionary of English v.0.48 :

  Eozoon \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.
     [1913 Webster]