M0245900 (mĕt′l-ŏg′rə-fē)n. The study of the structure of metals and alloys, especially by optical and electron microscopy and x-ray diffraction.met′al·log′ra·pher n.me·tal′lo·graph′ic(mə-tăl′ə-grăf′ĭk) adj.me·tal′lo·graph′i·cal·ly adv.EncyclopediaSeemetallography