malonic acid
noun
ma·lo·nic acid
| \ mə-ˈlōn-ik-
, -ˈlän-
\
, -ˈlän-
\
Medical Definition of malonic acid
: a crystalline dicarboxylic acid CH2(COOH)2 used especially in the form of its diethyl ester in organic synthesis (as of barbiturates and vitamins of the B complex)