In heraldry, the mascle is a lozenge voided, meaning a diamond-shaped figure with its center cut out. Its sharp geometry gives it a clean and memorable appearance, and its symbolic meanings are often connected with constancy, distinction, resilience, and ordered identity. Because it resembles a linked frame or open diamond, it can suggest strength without heaviness, clarity of purpose, and value refined by discipline. Like many simple geometric charges, the mascle may also have been chosen for visual balance, family tradition, or canting resemblance rather than for a single fixed symbolism.

The mascle is especially famous in the arms of the de Quincy family, Earls of Winchester, whose heraldry used red mascles on gold. Through inheritance and alliance, mascles became associated with several noble lines and territorial arms. They are also prominent in the arms of the City of Leicester, where cinquefoils and other inherited symbols connect civic identity with medieval lordship. In French and English heraldry, mascles are often found arranged in rows, bends, or fields, giving a coat of arms a strong patterned character that remains legible from a distance.

A mascle differs from a rustre, which is a lozenge pierced with a round hole, and from a simple lozenge, which is solid. It may appear singly, in multiples, interlaced, or arranged as a semy across the field. Useful definitions can be found in Parker’s A Glossary of Terms Used in Heraldry, with geometric examples at Heraldry of the World and broader explanation from The Heraldry Society. In coats of arms, the mascle remains an elegant emblem of noble distinction, structural strength, inheritance, and disciplined design.