(ˌfɒsfəˈtaɪdɪl; fɒsˈfætɪdɪl; ˌfɒsfəˈtaɪdaɪl) n (Chemistry) chem an atom or group of atoms containing one or more unpaired electrons derived from a phosphatide EncyclopediaSeePhosphatidyl Serine
phosphatidyl
phos·pha·ti·dyl (Ptd),
(fos'fă-tī'dĭl), The radical of a phosphatidic acid; for example, phosphatidylcholine.