lintel

In architecture, a lintel is the beam or other support at the top of a door or window. Most lintels are decorative as well as providing structural support.

A lintel can be purely ornamental, just an attractive horizontal flourish at the top of a door, or it can be a wood or metal support piece that also looks nice. Your fireplace might be topped by a stone lintel, and you might see a much older lintel in ancient Roman ruins, at the top of two massive pillars. In Old French, lintel means "threshold," from the Latin word limitaris, "bordering."

Definitions of lintel
1

n horizontal beam used as a finishing piece over a door or window

Synonyms:
header
Type of:
beam
long thick piece of wood or metal or concrete, etc., used in construction

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