the corresponding reference drug or reference biological product. (IV) Reference biological product The term reference biological product has the meaning given such term in section 1847A(c)(6)(I). (V) Reference drug The term reference drug means, with respect to a covered generic drug, the listed drug (as described in clause (i) of section 505(j)(2)(A) of the Federal Food, Drug, and Cosmetic Act) that is referred to in the abbreviated application for such covered generic drug under such section. (VI) Wholesale acquisition cost The term wholesale acquisition cost has the meaning given such term in section 1847A(c)(6)(B). .