  Anomalous CP-odd W+W-Z couplings can give rise to a forward-backward
asymmetry in the Z angular distribution in the e+e- centre-of-mass frame in the
process e+e- -> nu nubar Z. Of the three CP-odd couplings possible, only the
imaginary part of one of the couplings, f_4^Z, which is C odd and P even,
contributes to the forward-backward asymmetry. It is found that a limit of the
order of 0.1 can be placed on this coupling at a Next Linear Collider with
centre-of-mass energy of 500 GeV and integrated luminosity of 50 fb^{-1}.
