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Webster 1913 Edition

Noun.

[See

(Anc. Armor)

The piece designed to protect the arm from the elbow to the wrist.

vambrace ‎(plural vambraces)

The piece of armor designed to protect the arm from the elbow to the wrist.
The pieces of armor protecting the arm from the shoulder to the wrist. Not in common use in this sense, most scholars preferring the narrower definition, of armor for the lower arm.
- 1786: The vambraces included all the defence for the arms, from the pouldrons to the wrist.— Francis Grose, A Treatise on Ancient Armour and Weapons, page 21.

piece of armor from elbow to wrist

piece of armor from shoulder to wrist