muezzin

from WordNet (r) 3.0 (2006)

muezzin
    n 1: the Muslim official of a mosque who summons the faithful to
         prayer from a minaret five times a day [syn: {muezzin},
         {muazzin}, {muadhdhin}]

from The Collaborative International Dictionary of English v.0.48

muezzin \mu*ez"zin\ (m[-u]*[e^]z"z[i^]n), n. [Ar.]
   A Mohammedan crier of the hour of prayer; the Moslem official
   of a mosque who summons the faithful to prayer from a minaret
   five times a day. [Written also {mouezzin}, {mueddin},
   {muazzin}, {mu'adhdhin}, and {muwazzin}.]
   [1913 Webster + WordNet 1.5]