fingerprint
  指紋
  fingerprint
       n 1: biometric identification from a print made by an impression
            of the ridges in the skin of a finger; often used as
            evidence in criminal investigations
       2: a generic term for any identifying characteristic; "that tax
          bill had the senator's fingerprints all over it"
       3: a smudge made by a (dirty) finger [syn: fingermark]
       v : take an impression of a person's fingerprints