A dock or structure where battery equipment or ammunition is stored, loaded, or prepared.
From 'battery' (the artillery unit) plus 'dock' (a storage facility). This is a specialized military/naval term that emerged with modern artillery terminology.
Military batterdocks were (and are) extremely dangerous places—one accident or fire could ignite ammunition stores and destroy an entire facility, which is why they were built far from populated areas.
Complete word intelligence in one call. Free tier — 50 lookups/day.