Webster's English Dictionary

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ordnance

ord.nance \'o.rd-n*n(t)s\ n [ME ordinaunce, fr. MF ordenance, lit., act of 
   arranging] 1a: military supplies including weapons, ammunition, combat 
   vehicles, and t he necessary maintenance tools and equipment 1b: a service 
   of the army charged with the procuring, distributing, and saf ekeeping of 
   ordnance 2: CANNON, ARTILLERY