plenipotency

from The Collaborative International Dictionary of English v.0.48

Plenipotence \Ple*nip"o*tence\ (pl[-e]*n[i^]p"[-o]*tens),
Plenipotency \Ple*nip"o*ten*cy\ (pl[-e]*n[i^]p"[-o]*ten*s[y^]),
   n.
   The quality or state of being plenipotent. [R.]
   [1913 Webster]