  Polarized proton-deuteron (pd) Drell-Yan processes are investigated for
studying new spin structure of a spin-1 hadron. Our formalism indicates that
there exist many structure functions: 108 in general and 22 in the \vec
Q_T-integrated case. A naive parton model suggests that at least one of them
should be related to the tensor polarized distributions, which have not been
measured at all. There are some experimental possibilities at FNAL, HERA, and
RHIC to study the polarized pd reactions.
