
• (a.) Of, pertaining to, or designating, an organic acid (called also hydroxy malonic acid) obtained, by reducing mesoxalic acid, as a white crystalline substance.
Found on 
http://thinkexist.com/dictionary/meaning/tartronic/
 Tar·tron'ic  adjective
Tar·tron'ic  adjective [ 
 Tartro- + mal
 onic .] 
 (Chemistry) Of, pertaining to, or designating, an organic acid (called also 
 hydroxy malonic acid ) obtained, by reducing mesoxalic acid, as a white crystalline substance. 
Found on 
http://www.encyclo.co.uk/webster/T/13
  No exact match found.