crystallographyPronunciation: /ˌkrɪstəˈlɒgrəfi/Definition of crystallography noun [mass noun] the branch of science concerned with the structure and properties of crystals. Derivatives crystallographer noun crystallographicPronunciation: /-ləˈgrafɪk/ adjective crystallographically adverb crystallography in other Oxford dictionaries Definition of crystallography in the US English dictionary