(ˈ)ȯ|räd.ik- noun
Etymology: orotic probably from orot- (from Greek oros whey) + -ic more at serum
: a crystalline acid C 4 H 4 N 2 O 4 that was first found in milk, is a growth factor for various microorganisms (as Lactobacillus bulgaricus ), and is a precursor of the pyrimidines of nucleotides; 4-uracil-carboxylic acid