In astrology, this an aspect also known as the inconjunct. This occurs between two planets 150 degrees apart, using an orb of no more than five degrees each way. It is the aspect of adjustment.

Plinko, the rare game played by a very select number of seniors, is a Quincunx.

The Quincunx, is a device which has a glass face and pins arranged in a five layer (or more)pyramid. A ball is dropped from the top of the pyramid, and the pins deflect the ball either left or right, with equal probability. The order makes no difference in where the ball ends up. Whether its llrrr, or rrllr, the ball will end up in the right middle slot. This situation causes the balls to have a normal distribution. The quincunx was invented by Francis Galton to demonstrate in his lectures how a normal distribution works in the real world, and was the basis for his Law of Error. In Astronomy, and I guess science in general, this refers to the fact that the results of an experiment are almost never the same over and over. But, the results should form a normal distribution in which the most common result is likely to be closest to the true answer.

The slashes between the layers of pins represent that the
ball can go either left or right at any pin  


 
                  O
	      
 	          |			
  	          V	

                  *
                /   \ 
               *     *
             /   \ /   \
            *     *     *
          /   \ /   \ /   \  
         *     *     *     *
       /   \ /   \ /   \ /   \   
      *     *     *     *     *
    /   \ /   \ /   \ /   \ /   \
 |    |     |  *  |     |     |    |
 |    |     |  *  |  *  |     |    |
 |    |     |  *  |  *  |     |    |
 |    |     |  *  |  *  |     |    |
 |    |     |  *  |  *  |     |    |
 |    |     |  *  |  *  |  *  |    |
 |    |     |  *  |  *  |  *  |    |
 |    |  *  |  *  |  *  |  *  |    |
 |    |  *  |  *  |  *  |  *  | *  |
 |  * |  *  |  *  |  *  |  *  | *  |
 |____|_____|_____|_____|_____|____|

You can find a very nice simulation of a Quincunx at 

http://www.ms.uky.edu/~mai/java/stat/GaltonMachine.html

Nvidia's video cards, such as the GeForce3, uses a form of Anti-Aliasing which uses the idea of a quincunx perhaps to allow the pixel color to randomly overlap and supersede other pixels, or maybe to decide to what degree it will mix it with the original pixel color, to form smoother, less jagged, polygon edges in video games.

Quin"cunx (?), n. [L., fr. quingue five + uncia an ounce. The quincunx was marked by five small spots or balls. See Five, and Ounce the weight.]

1.

An arrangement of things by fives in a square or a rectangle, one being placed at each corner and one in the middle; especially, such an arrangement of trees repeated indefinitely, so as to form a regular group with rows running in various directions.

2. Astrol.

The position of planets when distant from each other five signs, or 150°.

Hutton.

3. Bot.

A quincuncial arrangement, as of the parts of a flower in aestivation. See Quincuncial, 2.

 

© Webster 1913.

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