noun
Etymology: phosphatidic from phosphatide + -ic
: any of several acids (RCOO) 2 C 3 H 5 OPO 3 H 2 that are formed from phosphatides by partial hydrolysis (as by removal of the nitrogen base), that are glycerides of glycerophosphoric acids, and that yield on hydrolysis two fatty-acid molecules RCOOH and one molecule each of glycerol and phosphoric acid