crash-helmet

crash helmet

noun
a helmet for protecting the head in the event of an accident, worn by motorcyclists, automobile racers, etc.

Origin:
1915–20

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
crash helmet
 
n
a padded helmet worn for motorcycling, flying, bobsleighing, etc, to protect the head in a crash

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