What does "raiffeisen" mean?

Raiffeisen: Designating, or pertaining to, a form of coöperative bank founded among the German agrarian population by Friedrich Wilhelm Raiffeisen (1818-88); as, Raiffeisen banks, the Raiffeisen system, etc. The banks are unlimited-liability institutions making small loans at a low rate of interest, for a designated purpose, to worthy members only.