lozenge

1. (shapes, heraldry) A thin rhombus, having two acute and two obtuse angles.Examples: "Wherein the decussis is made within a longilaterall square, with opposite angles, acute and obtuse at the intersection; and so upon progression making a Rhombus or Lozenge figuration [...]."; "How the junior partner of Hobbs and Dobbs leads her smiling to the carriage with the lozenge upon it, and the fat wheezy coachman!"; "The floor is constructed from marble lozenges and triangles of every imaginable hue: yellow and pink and all manner of mottled and blotched shades, framed in white."Synonyms: diamond