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The four quadrants of a Cartesian coordinate system. The axes of a two-dimensional Cartesian system divide the plane into four infinite regions, called quadrants, each bounded by two half-axes. The axes themselves are, in general, not part of the respective quadrants.
The quadrants may be named or numbered in various ways, but the quadrant where all coordinates are positive is usually called the first quadrant. If the coordinates of a point are ( x , y ) , then its distances from the X -axis and from the Y -axis are | y | and | x |, respectively; where | · | denotes the absolute value of a number.
Quadrant, a 1977 album by Joe Pass and Milt Jackson; Quadrant (college basketball), a performance measure derived from the Rating Percentage Index Quadrant, an Australian literary, cultural and centre-right political journal
Large frame quadrants were used for astronomical measurements, notably determining the altitude of celestial objects. They could be permanent installations, such as mural quadrants. Smaller quadrants could be moved. Like the similar astronomical sextants, they could be used in a vertical plane or made adjustable for any plane.
Also, rather than ordinals, quadrants are designated by the Greek letters Alpha, Beta, Gamma, and Delta. According to StarTrek.com, "if the great plane of the galaxy is viewed as a clock face and the 6 o'clock position bisects the Sol system" [7] (when viewed from the galactic north pole), then the four fictional quadrants are as follows:
Quadrants are described using ordinals—for example, "1st galactic quadrant", [1] "second galactic quadrant", [2] or "third quadrant of the Galaxy". [3] Viewing from the north galactic pole with 0 degrees (°) as the ray that runs starting from the Sun and through the galactic center, the quadrants are as follows (where l is galactic longitude):
Quadrants of the abdomen Diagram showing which organs (or parts of organs) are in each quadrant of the abdomen. The left lower quadrant (LLQ) of the human abdomen is the area left of the midline and below the umbilicus. The LLQ includes the left iliac fossa and half of the left flank region. The equivalent term for animals is left posterior ...
A "quadrant wings" curves to the left of the corps de logis of Kedleston Hall. Quadrant in architecture refers to a curve in a wall or a vaulted ceiling. Generally considered to be an arc of 90 degrees (one quarter of a circle), or a half of the more commonly seen architectural feature (a crescent).