Astragal

An astragal is a moulding profile composed of a half-round surface surrounded by two flat planes (fillets).

It can be an architectural element used at the top or base of a column, but is also employed as a framing device on furniture and woodwork.

The word "astragal" comes from the Greek for "ankle-joint", ἀστράγαλος, astrágalos.

The astragal closes the clearance gap created by bevels on one or both mating doors, and helps deaden sound.

It is sometimes confused with the wooden trim that divides the panes of a multi-light window or door, known as a muntin.