Gepard

Gepard represents a large number of German anti-aircraft artillery pieces and vehicles in the Wehrmacht of the Second World War and the Bundeswehr of today.

Because it has been applied to several guns, it has effectively become a common noun denoting a light armoured vehicle bearing several small bore cannon (usually in the 20 mm range) intended to be used for low level air defence. This is similar to the process by which jeep has become a generic term (although a civilian trademark of a division of DaimlerChrysler) for a light military truck intended to be used for transporting--whether on or off roads--several soldiers at a time, and sometimes mounted with machine guns, recoilless rifles or the like.