A specialist or expert who studies, records, analyzes, or classifies fingerprints for forensic identification purposes.
From dactylograph + -er (one who performs). This professional title solidified in the 20th century as fingerprinting became central to criminal justice.
Before computers, dactylographers were the real-life detectives of the fingerprint world—they could identify a criminal by comparing thousands of prints by hand, often solving cases that seemed unsolvable.
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