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devonian

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devonian


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Devonian  \De*vo"ni*an\,  a.  (Geol.) 
  Of  or  pertaining  to  Devon  or  Devonshire  in  England;  as  the 
  Devonian  rocks,  period,  or  system. 
 
  {Devonian  age}  (Geol.),  the  age  next  older  than  the 
  Carboniferous  and  later  than  the  Silurian;  --  called  also 
  the  {Age  of  fishes}.  The  various  strata  of  this  age 
  compose  the  Devonian  formation  or  system,  and  include  the 
  old  red  sandstone  of  Great  Britain.  They  contain,  besides 
  plants  and  numerous  invertebrates,  the  bony  portions  of 
  many  large  and  remarkable  fishes  of  extinct  groups.  See 
  the  Diagram  under  {Geology}. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Devonian  \De*vo"ni*an\,  n. 
  The  Devonian  age  or  formation. 
 
  From  WordNet  r  1.6  [wn]: 
 
  Devonian 
  n  :  from  345  million  to  405  million  years  ago;  dominance  of 
  fishes  and  appearance  of  amphibians  and  ammonites  [syn:  {Devonian}, 
  {Devonian  period},  {Age  of  Fishes}] 




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