mammetry
noun/ˈmæmɪtɹi/
Etymology From Middle English mawmetrie, from Anglo-Norman maumeterie, a reduced form of mahumetterie (“idolatry, heathendom”), from Mahumet (“Muhammad”), ultimately from Arabic مُحَمَّد (muḥammad) (see Muhammad for more). Equivalent to mammet + -ry.
1
Obsolete, Usually The religion of Muhammad: Islam.
2
Archaic, Usually Idolatry; paganism.