High Quality Content by WIKIPEDIA articles! A wonder weapon is any very advanced form of weaponry whose design, production or deployment in the field of battle is impractical or ill-timed. Such weapons are radical departures from, or improvements of, the arms or machinery used at the time and are often intended to turn the tide of a current conflict. These weapons are either never completed, or are introduced near the end of hostilities in limited capacity so the expectations far exceed the results. The term is a calque of the German word Wunderwaffen, which was coined during World War II. Amongst Germans, it was abbreviated into "Wuwa" /vu va/, which belittled these projects.