sectional

Sectional is an adjective and noun used across disciplines to indicate a relation to a section or to a system built from parts. As an adjective, it describes objects, concepts, or structures arranged or divided into distinct parts or modules. In some contexts it also refers to a cross-section or slice of something.

In mathematics and geometry, sectional is used to describe constructs defined by a section of a larger object. The most common usage is sectional curvature, which measures the curvature of two-dimensional plane sections through a point on a curved space. The term also appears in references to sectional planes or cross-sections used to study geometric properties.

In architecture, engineering, and technical drawing, a sectional view—or simply a section—shows interior features by cutting through an object. Sectional drawings reveal hidden details, such as how components fit together, the arrangement of internal parts, or the relationships between different layers or systems.

In furniture and interior design, a sectional refers to a modular seating arrangement made of multiple connected pieces. Sectionals can be configured in various layouts, such as L-shaped or U-shaped configurations, to fit different room shapes and seating needs.

Overall, sectional indicates a relationship to parts, slices, or modules chosen according to context, whether describing a geometric concept, a design drawing, or a piece of furniture.