Quincunx (disambiguation) explained
A quincunx originally meant a 5/12 fraction of something, but most modern uses involve patterns of five points. "Quincunx" or "quincuncial" may in particular refer to
Derived from original meaning
- Quincunx (Roman coin), a bronze coin with the value of 5/12 of an as
- Quincunx (astrology), an angle of 150°, 5/12 of a complete circle
Geometric patterns of points
- Quincunx, five points, four in a square with one more in the middle of the square.
- An orchard planted in a square lattice aligned diagonally to the surrounding plot of land
- Quincunx matrix, a 2×2 Hadamard matrix that generates points in a diagonal lattice pattern
- Bean machine, also called a quincunx, a machine designed by Sir Francis Galton to demonstrate normal distributions, consisting of an array of pins in a diagonal lattice pattern
- Quincuncial map, a method of mapping the globe onto a square so that the poles map to the five points of a quincunx
- Place des Quinconces, a city square in Bordeaux, France, named for the quincunx pattern in which its trees were planted
- Rhombic lattice, the points of intersection of two families of equally spaced parallel lines, called a quincunx In 19th-century mathematics
Literature
Biology
- Quincuncial aestivation, an arrangement of five parts of a flower bud prior to opening found in some plants
- Quincuncina, a genus of freshwater mussels named for the pattern of nodules on its shells