Mohammedanism

(noun) the monotheistic religious system of Muslims founded in Arabia in the 7th century and based on the teachings of Muhammad as laid down in the Koran. Synonyms: Islam, Islamism, Muhammadanism, Muslimism. Examples: "Islam is a complete way of life, not a sunday religion." "The term muhammadanism is offensive to muslims who believe that allah, not muhammad, founded their religion."