Definition

1. Noun:
   • An arch whose height is less than half its width: A "diminished arch" is a specific architectural structure, a type of arch where the vertical distance from its highest point (the crown) to the level of its supports (the springing line) is less than 50% of the horizontal distance between those supports.

Usage

• The term is used primarily in architecture, engineering, and historical building descriptions to classify and describe the proportions of an archway.
• It describes a low, wide, or flattened arch shape.

Examples

• Noun:
  • The doorway featured a diminished arch, giving it a low, wide appearance.
  • In Romanesque architecture, you can sometimes find diminished arches in certain nave arcades.

Advanced Usage

• Technical Specification: In technical drawings and specifications, a "diminished arch" is defined by the precise ratio of its rise (height) to its span (width).
• Structural Implication: This arch type distributes weight differently than a taller arch and may require different support considerations.

Variants and Related Words

• Segment arch: A very flat arch that is a segment of a circle; often synonymous with or a type of diminished arch.
• Flat arch: A general term for an arch with little curvature; a diminished arch is a specific kind of flat arch.
• Skew arch: An arch built at an angle to the face of its support; this describes its alignment, not its proportions, but a skew arch can also be diminished.

Synonyms

• Low arch: A general, non-technical synonym describing the visual characteristic.
• Shallow arch: Another descriptive synonym focusing on the lack of height.

Antonyms

• Stilted arch: An arch where the curve begins above the impost level, effectively making it taller.
• Pointed arch: An arch with a distinct peak, typical of Gothic architecture, which often has a height greater than half its width.

Noun

1. an arch whose height is less than half its width