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)) ]