1. Using human physical characteristics (face shape, finger prints, etc) for identification
   "biometric authentication"

Encyclopedia: Biometric

• pigeon loft
• pigeon pea
• pigeon toes
• pigeon-breasted
• pigeon-pea plant
• pigeon-toed
• pigeonhole
• pigeonholing
• pigfish
• piggery
• piggish
• piggishly
• piggishness
• piggy
• piggy bank
• piggyback
• piggyback plant
• pigheaded
• pigheadedness
• piglet
• pigman
• pigment
• sun plant
• sun protection factor
• Sun River