quatrefoil

A representation of a flower with four petals or a leaf with four leaflets, especially in heraldry.

Tracery or an ornament with four foils or lobes.

A leaf with four leaflets, as sometimes that of clover.

In architecture, an opening or a panel divided by cusps or foliations into four foils, or, more correctly, the figure formed by the cusps.

In heraldry, a four-leaved grass, or leaf divided into four leaflets, used as a bearing.

a symmetrical shape which forms the overall outline of four partially-overlapping circles of the same diameter.

A stylized flower or leaf with four lobes.