mo·ri·on /ˈmɔriˌɒn, ˈmoʊr-/
-noun an open helmet of the 16th and early 17th centuries, worn by common soldiers and usually having a flat or turned-down brim and a crest from front to back.

[Origin: 1555-65; < MF < Sp morrión, equiv. to morr(o) top of head + –ión n. suffix]


we were interrupted by the entrance of five or six men in identical surcoats, bearing halberds, with morion helmets decorated by feathers, their hands and feet both mailed.

Source: Von Bek, ‘The Warhound and the World’s Pain’, Michael Moorcock.

The old man was furbishing a shield and morion-cap, and other tackle of war lay at his feet.

Source: The Worm Ouroboros by E R Eddison.