Pronunciation: (hel'mit), [key]
1. any of various forms of protective head covering worn by soldiers, firefighters, divers, cyclists, etc.
2. medieval armor for the head.
3. (in fencing, singlestick, etc.) a protective device for the head and face consisting of reinforced wire mesh.
4. anything resembling a helmet in form or position.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.