The word quatrefoil etymologically means "four leaves", and applies to general four-lobed shapes in various contexts. In heraldry In heraldic terminology, a quatrefoil is a representation of a flower with four petals, or a leaf with four leaflets (such as a four-leaf clover). It is sometimes shown "slipped", for example with an attached stalk. However, it isn't defined as a flower, but called a "foil". In architecture/symbolism In architecture and traditional Christian symbolism, a quatrefoil is… (More on Quatrefoil)