
• (a.) Of, pertaining to, or obtained from, Polygala; specifically, designating an acrid glucoside (called polygalic acid, senegin, etc.), resembling, or possibly identical with, saponin.
Found on 
http://thinkexist.com/dictionary/meaning/polygalic/
 Po·lyg'a·lic  adjective  (Chemistry)
Po·lyg'a·lic  adjective  (Chemistry) Of, pertaining to, or obtained from, Polygala; specifically, designating an acrid glucoside (called 
 polygalic acid , 
 senegin , etc.), resembling, or possibly identical with, 
 saponin . 
Found on 
http://www.encyclo.co.uk/webster/P/121
  No exact match found.