| A | B |
| Islam | a monotheistic religion that developed in Arabia in the Seventh Century AD |
| Muslim | a follower of Islam |
| Allah | God (Islam) |
| Muhammad | prophet-taught that Allah was the only God |
| Qur'an/Koran | The Holy Book of Islam |
| Hijrah | Muhammad's migration from Mecca to Yathrib (Medina) in AD 622 |
| Hajj | a pilgrimage to Mecca, performed as a duty by Muslims |
| Mecca | Site of Pilgrimage - important stop on trade route - religious center |
| Medina | "city of the Prophet" - place where Muhammad resettled |
| Mosque | an Islamic place of worship |
| Sunni | the branch of Islam whose members acknowledged the first four caliphs as the rightful successors of Muhammad |
| Shi'a | the branch of Islam whose members acknowledged Ali and his descendants as the rightful successors of Muhammad |
| Caliph | a supreme political and religious leader in a Muslim govenment |
| House of Wisdom | a center of learning established in Baghdad in the 800s |
| Calligraphy | the art of beautiful handwriting |
| Exocommunication | the taking away of a person's right of membership in a Christian church |
| Schism | a split or division-especially a formal split within a Christian church |
| Czar | a Russian emperor (from the Roman title Caesar) |