Muslim
Pronunciation: /ˈmʊzlɪm, ˈmʌz-, -s-/
(also Moslem)

Origin:
early 17th century: from Arabic, active participle of 'aslama (see Islam)

Muslim is the preferred spelling for ‘a follower of Islam’, although the form Moslem is also used. The archaic term Muhammadan (or Mohammedan) is not favoured by Muslims and should be avoided.