The Collaborative International Dictionary of English v.0.48:

Pampre \Pam"pre\ (p[a^]m"p[~e]r), n. [F. pampre a vine branch,
   L. pampinus.] (Sculp.)
   An ornament, composed of vine leaves and bunches of grapes,
   used for decorating spiral columns.
   [1913 Webster]