2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Theriac  \The"ri*ac\,  Theriaca  \The*ri"a*ca\,  n.  [L.  theriaca  an 
  antidote  against  the  bite  of  serpents,  Gr  ?:  cf  F. 
  th['e]riaque.  See  {Treacle}.] 
  1.  (Old  Med.)  An  ancient  composition  esteemed  efficacious 
  against  the  effects  of  poison;  especially,  a  certain 
  compound  of  sixty-four  drugs,  prepared,  pulverized,  and 
  reduced  by  means  of  honey  to  an  electuary;  --  called  also 
  {theriaca  Andromachi},  and  {Venice  treacle}. 
 
  2.  Treacle;  molasses.  --British  Pharm. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Theriac  \The"ri*ac\,  Theriacal  \The*ri"a*cal\,  a.  [Cf.  F. 
  th['e]riacal.] 
  Of  or  pertaining  to  theriac;  medicinal.  ``Theriacal  herbs.'' 
  --Bacon. 

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