Which type of commodity is defined as having only a military application?

The term that accurately describes a commodity specifically intended for military applications is referred to as "single use." This classification underscores that the commodity's design, development, and intended purpose are strictly for military operations, as opposed to having applications in civilian or commercial sectors.

In contrast, "dual use" refers to items that can be used for both civilian and military purposes, which does not align with the definition of a commodity having only military applications. Civilian commodities are designed for use in non-military contexts, while commercial items typically serve broader market demands rather than being restricted to military use. Thus, the term "single use" correctly captures the exclusivity of military application as outlined in the question.