ZnV2O4 possesses coupled spins, lattice and orbital degrees of freedom. A number of models of orbital ordering have been proposed for the tetragonal phase, these are real orbital ordering, complex orbital order and homopolar bond formation. The different orbital ordering models give rise to different exchange interactions and anisotropies. The interactions will be reflected in the magnetic excitation spectrum and there are precise predictions of the spin-wave modes for the models showing that they can be distinguished by the size of their bandwidths, whether they have optic as well as acoustic modes and their anisotropy gaps. In this proposal we plan to measure the magnetic excitation spectrum of ZnV2O4 and compare the results to the theoretical predictions, and thus distinguish between the models of orbital ordering.