An astrology term denoting planets at a distance of five
signs of 150 degrees from each other. The term was once generally
used to denote a disposition of five objects (especially
plants or trees) placed so that there is one in each corner of a
square or rectangle with the fifth in the center. The use of the
quincunx in various aspects throughout history was exhaustively
discussed by the English physician and author Sir Thomas
Browne (1605–1682) in his book The Garden of Cyrus (1658)