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fingerprint (n.)

also finger-print, 1834, from finger (n.) + print (n.). Attempts to classify fingerprint types as a means of identification began in the 1820s; the current arch-loop-whorl system was introduced by Francis Galton in 1892. Admissibility as evidence as valid proof of guilt in murder trials in U.S. was upheld in 1912. From 1900 as a verb. Related: Fingerprinted; fingerprinting.

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Definitions of fingerprint from WordNet
1
fingerprint (n.)
a print made by an impression of the ridges in the skin of a finger; often used for biometric identification in criminal investigations;
fingerprint (n.)
a generic term for any identifying characteristic;
that tax bill had the senator's fingerprints all over it
fingerprint (n.)
a smudge made by a (dirty) finger;
Synonyms: fingermark
2
fingerprint (v.)
take an impression of a person's fingerprints;
From wordnet.princeton.edu