Encyclopedia of historical weapons - Boss

Also umbo. The round shaped piece of metal at the center of a shield. Protects the hand.

Encyclopedia of historical weapons

From Encyclopedia

Annellet
The small loops leading from quillions to the blade. Made to protect the finger wrapped over the guard.
Basnet
See Basinet.
Ventail
An integral flap of mail attached to the coif in the thirteenth century; it could be drawn across the mouth to protect the lower face.
Ancus
Indian elephant goad; vary greatly in size from about 40 to 120 centimeters in length; shorter ones were used by riders, while the longer versions…
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