Sentence:  The <WSD>morion</WSD> is a kind of open helmet, without visor or bever, somewhat resembling a hat; it was commonly worn by the harqubussiers and musqueteers. 
Meaning of the word marked with <WSD> tags:  A kind of open brimmed helmet used by footsoldiers in the 16th and 17th centuries, having no visor or bever. (from 16th c.)