(historical) A bronze helmet of Ancient Greek origin, covering the head and neck, with slits for the eyes and mouth.

plural of Corinthian helmet

(UK, uncountable) The invasive plant Impatiens glandulifera. / Used other than figuratively or idiomatically: see policeman, helmet.

plural of kettle helmet

Synonym of kettle hat

Dated form of crash helmets; plural of crash-helmet.

Dated form of crash helmet.

plural of space helmet

(idiomatic) An accidental messy hairdo resulting from the wearing of a helmet.

plural of helmet hair