biometric authentication, biometric identification, identity verification - the automatic identification of living individuals by using their physiological and behavioral characteristics; "negative identification can only be accomplished through biometric identification"; "if a pin or password is lost or forgotten it can be changed and reissued but a biometric identification cannot"

loop - the basic pattern of the human fingerprint

thumbprint - fingerprint made by the thumb (especially by the pad of the thumb)

black and white, print - the result of the printing process; "I want to see it in black and white"

identification - evidence of identity; something that identifies a person or thing

blot, smirch, smudge, daub, slur, smear, spot - a blemish made by dirt; "he had a smudge on his cheek"

reproduce - make a copy or equivalent of; "reproduce the painting"