(lit. pillar, pl. arkan) In fiqh, an integral part of an act, such as a transaction, without which the act can not be said to have been performed.
Bayt al-mal
Al-sawafi
Al-‘ushr
Al-jizyah
Ijma`
Sighah
Riba al-nasi'ah
Bai al-wafa'
Al- kharaj bildaman
Musharakah Convertible Income Certificates