lozengeshaped

Lozengeshaped denotes anything that has the outline or contour of a lozenge, also called a diamond. In geometry, a lozenge is a rhombus, a four‑sided figure with all sides equal and opposite sides parallel. Its interior angles come in opposite pairs, producing two acute angles and two obtuse angles. In many practical contexts the shape is the diamond used in playing cards or in tiling, which commonly has angles of 60 and 120 degrees, though other rhombic shapes are also described as lozenge-shaped.

Etymology: The word lozenge comes from the French losange, relating to the lozenge-shaped emblem used in heraldry; the English adjective lozengeshaped follows from that noun.

Applications: The lozenge shape appears in graphic design, logos, surface ornamentation, jewelry, signage, and architecture. It is also used as a tile in the lozenge tiling pattern, a well-known approach to tiling the plane with congruent rhombi. The term is commonly employed in heraldry to describe diamond-shaped charges or motifs.

See also: lozenge, lozenge tiling, rhombus, diamond shape, heraldry.