ordnance

n. 大炮, 军械, 武器

ord.nance

n.Abbr. ord.,ordn.（名词）缩写 ord.,ordn.
Military materiel, such as weapons, ammunition, combat vehicles, and equipment.
军械：军事物质，包括武器、弹药、战车及装备
The branch of an armed force that procures, maintains, and issues weapons, ammunition, and combat vehicles.
军械署：军队中负责采购、管理和发放武器、弹药和战车的一个部门
Cannon; artillery.
重炮；火器

来源：
Middle English ordnaunce
中古英语 ordnaunce
variant of ordinaunce [order, military provision] * see ordinance
ordinaunce的变体 [订购的货物，军队供应品] *参见 ordinance