1. a helmet, especially one worn by soldiers or firefighters
2. a helmet-like structure or growth on the head of certain birds or animals
Usage: zoology

Examples

• The medieval knight wore a steel casque into battle.
• The firefighter’s casque protected him from falling debris.
• The hornbill’s distinctive casque makes it easily recognizable.
• Ancient Roman soldiers were equipped with bronze casques.
• The cassowary’s bony casque helps it push through dense vegetation.
• Museum visitors admired the ornate casque from the 15th century.