morion
A kind of open brimmed helmet used by footsoldiers in the 16th and 17th centuries, having no visor or bevor.
historical
The Roman footmen caried not their morions, sword and target only, as for other armes (saith Cicero) they were so accustomed to weare them continually, that they hindered them no more than their limbs[…].
Where it comes from
From Middle French morion, from, Spanish morrión, from morra (“upper part of the head”), from morro (“muzzle, snout”), from Vulgar Latin *murrum (“muzzle, snout”). Related to moraine (“an amassment of rocks on a glacier”).
Adapted from the Wiktionary entry morion (CC BY-SA 4.0).