noun. A plant or flower with six leaves.

noun. In her., decorative art, arch., etc., a figure of six lobes or foliations, similar in character to the cinquefoil. Also sisefoil (in heraldry).

noun. A stylized flower or leaf with six lobes.

"By degrees the bowl became broader and shallower, and instead of the base having six points, its form is a sexfoil without any points."

cinquefoil  huitfoil  quatrefoil  trefoil