Lozenge /(lŏz"ĕnj)/

Loz·enge

Lozenge

n.
  1. A diamond-shaped figure usually with the upper and lower angles slightly acute, borne upon a shield or escutcheon. Cf. Fusil. (Her.)
  2. A figure with four equal sides, having two acute and two obtuse angles; a rhomb.
  3. Anything in the form of lozenge.
  4. A small cake of sugar and starch, flavored, and often medicated. -- originally in the form of a lozenge.

Phrases & Compounds
Lozenge coach
the coach of a dowager, having her coat of arms painted on a lozenge.
Lozenge-molding
a kind of molding, used in Norman architecture, characterized by lozenge-shaped ornaments.