Lewis & Short

dēnōmĭnātĭo, ōnis, f. [denomino], rhetor. t. t., the substitution of the name of an object for that of another to which it has some relation, as the name of the cause for that of the effect, of the property for that of the substance, etc.; a metonymy, Auct. Her. 4, 32; cf. Quint. 8, 6, 23 sq., and immutatio.