fin·ger·print 
(fĭnggər-prĭnt′)
(fĭnggər-prĭnt′)n.
1.
a. A mark left on a surface by a person's fingertip.
b. An image of the ridges on a person's fingertip made by putting ink on the fingertip and pressing it against a surface or by using a digital scanning device.
2. A distinctive or identifying mark or characteristic: "We can, from his retelling [of the incident], with its particular fingerprint of stresses and omissions, learn a great deal about him" (Mark Slouka).
3.
a. See DNA profile.
b. A chemical fingerprint.
tr.v. fin·ger·print·ed, fin·ger·print·ing, fin·ger·prints
To take the fingerprints of.