"A helmet is a form of protective gear worn to protect the head. More specifically, a helmet complements the skull in protecting the human brain. Ceremonial ...
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or symbolic helmets (e.g. UK policeman´s helmet) without protective function are sometimes worn. Soldiers wear helmets, often made from lightweight plastic materials.
The word helmet is diminutive from helm, a medieval word for protective combat headgear. The medieval great helm covers the whole head and often is accompanied with camail protecting throat and neck as well. Originally a helmet was a helm which covered the head only partly and protected it from injury in accidents." - (en.wikipedia.org 08.09.2020)
