Dactylography refers to the study of fingerprints, which are used for identification purposes. There are several synonyms for this term, such as dermatoglyphics, which is the scientific study of fingerprints, palmistry, which is the art of reading palms, and biometrics, which is the use of unique biological characteristics for identification purposes. Other synonyms for dactylography include chirography, which is the study of handwriting, graphology, which is the analysis of handwriting to determine a person's personality, and phrenology, which is the study of the shape and size of the skull to determine a person's mental traits. All these synonyms are used in different contexts, but they all refer to the study of human identification.