Kalmar "muadh-dhin" (wanda kuma aka rubuta "muezzin" ko "mu'adhdhin") tana nufin mutum a cikin al'adun Musulunci wanda ya kira musulmi zuwa ga salla daga masallaci ko wani wurin ibada. Muadh-dhin yakan yi adhan, wanda shine kiran sallah na Musulunci, ta hanyar amfani da lasifika ko wasu hanyoyi don sanar da lokacin kowace salloli biyar. Kalmar "muadh-dhin" ta fito daga Larabci kuma tana nufin "mai kiran sallah" ko "mai bushara."