fingerprint

/ˈfɪŋɡɚˌpɹɪnt/noun

The pattern of ridged skin on the tip of a finger, which is different for every person.

Example sentence

“Police found a fingerprint on the broken window.”

The figurative use is common in science writing: a chemical or genetic fingerprint is a pattern unique enough to identify its source.

Related words

passcodeA sequence of letters or numbers entered to unlock a device or prove your identity.biometricConnected with identifying people through their physical characteristics, such as fingerprints.loginThe act of signing in to a computer system, or the username and details used to do so.authenticationThe process of proving your identity in order to access a computer system or network.logoutThe act of signing out of a computer system or account.spamUnwanted messages, usually advertisements, sent out in bulk by email or other electronic means.