A mu'adhin is a person who calls the prayer in other words the caller of the adhan
The muathin, also spelled muadhin or muazzin.
Abdullahi ibn ummu Makhtum
Muslims are obligated to pray five specific times of the day. The "Call of Prayer" Usually offered by a male, known as "Mu'azan" in Arabic. The prayer call recalls Muslims to offer prayer for the remembrance of their creator "ALLAH TALA" and be thankful to his grants.