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eocene

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eocene


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Eocene  \E"o*cene\,  a.  [Gr.  ?  daybreak,  dawn  +  ?  new  recent.] 
  (Geol.) 
  Pertaining  to  the  first  in  time  of  the  three  subdivisions 
  into  which  the  Tertiary  formation  is  divided  by  geologists, 
  and  alluding  to  the  approximation  in  its  life  to  that  of  the 
  present  era;  as  Eocene  deposits.  --  n.  The  Eocene  formation. 
  --Lyell. 
 
  From  WordNet  r  1.6  [wn]: 
 
  Eocene 
  n  :  from  40  million  to  58  million  years  ago;  presence  of  modern 
  mammals  [syn:  {Eocene},  {Eocene  epoch}] 




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