from The Century Dictionary and Cyclopedia
- n. In medieval times— An iron skull-cap: sometimes popularly called chaplet. See coif, 3, and secret. A helmet having nearly the form of an ordinary hat, that is, having a brim surrounding a more or less well-defined crown.
Sorry, no etymologies found.
An illustration is given of a chapel-de-fer which reposes in the noble hall of Ockwells, Berkshire, much dented by use.