= = = = = = melange ( me'-lange also ma , lanj ) n-s , origin uncertain ( thought to derive from ancient terran franzh ) : a. mixture of spices ; b. spice of arrakis ( dune ) with geriatric properties first noted by yanshuph ashkoko , royal chemist in reign of shakkad the wise ; arrakeen melange , found only in deepest desert sands of arrakis , linked to prophetic visions of paul muad'dib ( atreides ) , first fremen mahdi ; also employed by spacing guild navigators and the bene gesserit .