1. the triangular space between the curve of an arch and the rectangular frame surrounding it
Usage: architecture
2. a space between two arches or between an arch and a rectangular enclosure
Usage: architecture
3. a byproduct or side effect of an evolutionary adaptation that serves no direct function
Usage: biology; evolutionary theory

Examples

• The cathedral’s spandrels were decorated with intricate stone carvings.
• Architects filled the spandrel with ornamental designs to enhance the building’s appearance.
• The bridge’s spandrels provided additional structural support between the arches.
• Medieval builders often left spandrels plain to reduce construction costs.
• In evolutionary biology, some traits may be spandrels rather than direct adaptations.
• The peacock’s elaborate tail feathers might include spandrel characteristics alongside sexually selected features.