WordWeb Online

1. Armour plate that protects the head
    
2. A protective headgear made of hard material to resist blows

Derived forms: helmets

Type of: armor plate [US], armor plating [US], armour plate [Brit, Cdn], armour plating [Brit, Cdn], headdress, headgear, plate armor [US], plate armour [Brit, Cdn]

Part of: body armor [US], body armour [Brit, Cdn], cataphract, coat of mail, suit of armor [US], suit of armour [Brit, Cdn]

Encyclopedia: Helmet, Virginia