Lit: One-fifth. Tech: It has come to be known as one-fifth share of the state from the booty. In the early days of Islam, it used to be one of the major sources of public revenue.
Al-tadlis
Al-ibrah
Al-jadha‘h
Al-khabalah
Fuduli
Al-iqtisad
Al-bai‘ al-najiz
Al-ghamir
Al-kali
Al-khiyanah