magnum
/ˈmægnəm/noun
(pl. magnums)
1- a thing of a type that is larger than normal, in particular大于正常尺寸之物, 尤指：
1.1
- a wine bottle of twice the standard size, normally 1½ litres（比普通酒瓶大一倍的）大酒瓶（通常容量为1.5升）。
1.2
- often as modifier(trademark in the US) a gun designed to fire cartridges that are more powerful than its calibre would suggest〈美国商标〉大威力子弹枪械（指能发射杀伤力比其口径所示威力更大的枪械）。
词源
late 18th cent.: from Latin， neuter (used as a noun) of magnus 'great'.