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substratummore about substratum


  2  definitions  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Substratum  \Sub*stra"tum\,  n.;  pl  {Substrata}.  [L.  substratus, 
  p.  p.  of  substernere  to  strew  under  sub  under  +  sternere  to 
  strew.  See  {Stratum}.] 
  1.  That  which  is  laid  or  spread  under  that  which  underlies 
  something  as  a  layer  of  earth  lying  under  another; 
  specifically  (Agric.),  the  subsoil. 
  2.  (Metaph.)  The  permanent  subject  of  qualities  or  cause  of 
  phenomena;  substance. 
  From  WordNet  r  1.6  [wn]: 
  n  :  any  stratum  lying  underneath  another  [syn:  {substrate}] 

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