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

Encyclopedia: Biometric

• oxidase
• oxidate
• oxidation
• oxidation number
• oxidation state
• oxidation-reduction
• oxidation-reduction indicator
• oxidative
• oxidative phosphorylation
• oxide
• oxidisable
• oxidisation
• oxidise
• oxidised
• oxidised LDL cholesterol
• oxidiser
• oxidising agent
• oxidizable
• oxidization
• oxidize
• oxidized
• oxidized LDL cholesterol
• oxidizer
• oxidizing agent
• oxidoreductase