Word	Meaning
Rabb-Ul-Maal	The one who provides the finance in a Mudhaarabah agreement.
Rabi-al-Awwal	The third month of the Islamic calendar.
Radiallahu-Anha	May Allah be pleased with her.
Rajih	Preferable.
Rak'at	One unit of a prayer.
Ramadhaan	Ninth month of the Islamic calendar.
Rasool	A messenger.
Rasulullah	Messenger of Allah (Prophet Muhammad).
Ratl	A measure used in Baghdad to weigh foodstuffs.
Riba	Literally means increase or addition and refers to the 'premium' that must be paid by the borrower to the lender along with the principal amount as a condition for the loaner OR an extension in its maturity. It is equivalent to interest.
Rikaaz	Buried treasure.
Rooh	Soul.
Rub-ul-Ushr	Quarter of a tenth.
Ruku	Ritual of bowing down in prayer.
Rukun	A principle