Astragal

An astragal is a moulding profile composed of a half-round surface surrounded by two flat planes (fillets). An astragal is sometimes referred to as a miniature torus. 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.

For the bones used in throwing games, see Knucklebones. For glazing bar known as an astragal in Scotland, see muntin.

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

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