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isomerism

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isomerism


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Isomerism  \I*som"er*ism\,  n.  (Chem.) 
  The  state,  quality,  or  relation,  of  two  or  more  isomeric 
  substances. 
 
  {Physical  isomerism}  (Chem.),  the  condition  or  relation  of 
  certain  (metameric)  substances,  which  while  chemically 
  identical  (in  that  they  have  the  same  composition,  the 
  same  molecular  weights,  and  the  same  ultimate 
  constitution),  are  yet  physically  different,  as  in  their 
  action  on  polarized  light,  as  dextro-  and  l[ae]vo-tartaric 
  acids.  In  such  compounds  there  is  usually  at  least  one 
  unsymmetrical  carbon  atom.  See  {Unsymmetrical}. 
 
  From  WordNet  r  1.6  [wn]: 
 
  isomerism 
  n  :  the  state  of  being  an  isomer;  the  complex  of  chemical  and 
  physical  phenomena  characteristic  of  isomers 




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