helmet -
n. 1
any of various
protective head-coverings worn by soldiers, policemen, firemen, divers, motor cyclists, etc.
2 Bot. the arched upper part of the corolla in some flowers.
3 the shell of a gastropod mollusc of the genus Cassis, used in jewellery.
helmeted adj. [ME f. OF, dimin. of helme f. WG (as HELM(2))]
