Mohammedan (also spelled Muhammadan, Mahommedan, Mahomedan or Mahometan) is a term for a follower of the Islamic prophet Muhammad. It is used as both a noun and an adjective, meaning belonging or relating to, either Muhammad or the religion, doctrines, institutions and practices that he established. The word was formerly common in usage, but the terms Muslim and Islamic are more common today. Though sometimes used stylistically by some Muslims, a vast majority consider the term a misnomer.
The Oxford English Dictionary cites 1663 as the first recorded usage of the English term, along with the older term Mahometan that dates back to at least 1529. The English term is derived from New Latin Mahometanus, from Medieval Latin Mahometus, Muhammad. It meant simply a follower of Mohammad.
In Western Europe, down to the 13th century or so, Christians had a mistaken belief that Muhammad had either been a heretical Christian or that he was a god worshipped by Muslims. Some works of Medieval European literature referred to Muslims as "pagans" or by sobriquets such as the paynim foe. Depictions, such as those in the Song of Roland, depict Muslims praying to a variety of "idols", including Apollo, Lucifer, Termagant, and Mahound. When the Knights Templar were being tried for heresy, reference was often made to their worship of a demon Baphomet; this is similar to "Mahomet", the Latin transliteration of Muhammad's name, and Latin was, for another 500 years, the language of scholarship and erudition for most of Europe.