fingerprint
Refers to the pattern of ridges on a fingertip, used for identification. Common in forensic, security, and everyday contexts.
The police collected fingerprints at the scene.
I unlock my smartphone with fingerprint authentication.
There were fingerprints on the glass.
The police collected fingerprints from the scene.
The system automatically matches fingerprints.
The culprit didn't leave any fingerprints at the scene.