quadrant
UK: ˈkwɒdrənt | US: ˈkwɑːdrənt
n. 1. One of four equal parts of a circle or other shape, divided by two perpendicular lines.
n. 2. A device or part of an instrument used for measuring angles, especially in astronomy or navigation.
n. 3. A specific sector or region in a larger system (e.g., urban planning or biology).
The word quadrant traces back to Latin quadrans, meaning "a fourth part." It originally described a quarter-circle or a 90-degree segment, reflecting its geometric use. Over time, it expanded to tools (like the navigational quadrant) that measure such angles. The morpheme quadr- persists in related terms (e.g., quadrilateral, quadruple), consistently tied to the concept of "four."
The city’s cultural district occupies the northeast quadrant of the map.
Sailors once relied on a quadrant to determine their latitude at sea.
Each quadrant of the circle represents a 90-degree angle.
The biologist studied cell division in the lower-left quadrant of the slide.
Urban planners divided the project into four quadrants for phased development.