quincunx

noun4

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. •
   A Galton board.

   • In 1873–74 Sir Francis Galton (Charles Darwin’s cousin) designed an apparatus that he later named the quincunx. — 1998
3. •
   (historical) A bronze coin minted during the Roman Republic, valued at five-twelfths of an as.
4. •
   An angle of five-twelfths of a circle, or 150°, between two objects.