Biometric is made up of two words, bio and metric. Bio means life-related, metric means measuring.

Thumb marks, fingers prints, voice or even eye pupils, all these things are unique to each individual and hence can act an identification for the person.

In bio-metrics, we study the information or data related to a living being. 

With the help of this technique, it identifies the person by their thumb mark, fingers  marks, voice or even eye pupils.