quincunx

noun

1. An arrangement of five units with four forming the corners of a square and the fifth at the centre of the square, a pattern corresponding to the five-spot on dice, playing cards, or dominoes.
2. An angle of five-twelfths of a circle, or 150°, between two objects.
3. A Galton board.

   “In 1873–74 Sir Francis Galton (Charles Darwin’s cousin) designed an apparatus that he later named the quincunx.”

4. (historical)A bronze coin minted during the Roman Republic, valued at five-twelfths of an as.