Definition of sexfoil in English:

sexfoil

noun

  • (especially in architecture) an ornamental design having six leaves or petals radiating from a common center.

    • ‘It is circular with a sexfoil depression.’
    • ‘The general obverse type is of a crowned and bearded portrait inside a triangle with a hand holding a sceptre to the left and a cinquefoil or sexfoil to the right.’

Origin

Late 17th century: from sexi- six on the pattern of words such as trefoil.

Pronunciation:

sexfoil

/ˈseksfoil/