Answer Description
A Biometric lock is a lock that uses a person's physical attributes to authenticate them. It may also use non-physical attributes like voice recognition, however options like fingerprints, iris scans and facial recognition are more common in a security scenario.
Wikipedia
A biometric device is a security identification and authentication device Such devices use automated methods of verifying or recognising the identity of a living person based on a physiological or behavioral characteristic These characteristics include fingerprints, facial images, iris and voice recognition
Biometric_device - Wikipedia, the free encyclopedia