noun
muezzin
moo-EZ-in/muːˈezɪn/
A mosque official who calls Muslims to prayer.
The muezzin delivers the call to prayer through a microphone.

Etymology
The Arabic title describes someone who proclaims or announces. It names the mosque official by his defining duty: making the call that summons Muslims to prayer.
More examples
- We hear the muezzin's call just before dawn.
- The mosque appoints a new muezzin.
- Muezzins call Muslims to prayer five times a day.
Forms
muezzin · muezzins
adhan noun — The Muslim call to ritual prayer.