(optics, of a lens) Having surfaces with the same radius of curvature.
equiexcellency
quincunx
quincunx
noun
(astrology) An angle of five-twelfths of a circle, or 150°, between two objects.
(historical, numismatics) A bronze coin minted during the Roman Republic, valued at five-twelfths of an as.
A Galton board.
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.
