2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Theine  \The"ine\,  n.  [F.  th['e]ine,  fr  NL  thea.  See 
  {Theiform}.]  (Chem.) 
  See  {Caffeine}.  Called  also  {theina}. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Caffeine  \Caf*fe"ine\,  n.  [Cf.  F.  caf['e]ine.  See  {Coffee}.] 
  (Chem.) 
  A  white,  bitter,  crystallizable  substance,  obtained  from 
  coffee.  It  is  identical  with  the  alkaloid  {theine}  from  tea 
  leaves,  and  with  {guaranine}  from  guarana. 

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