1 a group of five objects arranged in the shape of a rectangle with one at each of the four corners and the fifth in the centre
2 (Botany) a quincuncial arrangement of sepals or petals in the bud
3 (Astrology) an aspect of 150° between two planets
(C17: from Latin: five twelfths, from quinque five + uncia twelfth; in ancient Rome, this was a coin worth five twelfths of an as2 and marked with five spots)
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