plaquette

from The Collaborative International Dictionary of English v.0.48

Plaquette \Pla`quette"\, n. [F., dim. of plaque plate, plaque.
   See {Plaque}.]
   A small plaque, esp., in modern medal engraving, a small and
   delicate bas-relief, whether cast or struck from a die, or of
   form other than circular.
   [Webster 1913 Suppl.]