"Q" is for Quincunx

quincunx |?kwin?k? ng ks|
noun ( pl. quincunxes )
1 an arrangement of five objects with four at the corners of a square or rectangle and the fifth at its center, used for the five on dice or playing cards, and in planting trees.

2 Astrology an aspect of 150°, equivalent to five zodiacal signs.
DERIVATIVES
quincuncial |?kwin?k?n sh ?l| adjective
quincuncially |?kwin?k?n sh ?l?| adverb
ORIGIN mid 17th cent.: from Latin, literally 'five twelfths,' from quinque 'five' + uncia 'twelfth.'