Coif (noun)

1. A close-fitting cap or head covering, typically made of linen or lace, worn by women in the late 16th and early 17th centuries.
2. A medieval helmet or hood of mail or plate covering the head and neck.

Origin:

Derived from the old french word "coife" meaning "cap" or "head covering".

Examples:

1. The queen wore a coif adorned with pearls.
2. The knight's coif protected his head and neck in battle.
3. The coif was a popular head covering in the 16th century.
4. The coif was worn by women to keep their hair in place.
5. The coif was an important part of a knight's armor.