astragal

[ as-truh-guh l ]

/ ˈæs trə gəl /

a small convex molding cut into the form of a string of beads. Compare bead and reel.

a plain convex molding; bead.

a molding attached to one or both meeting stiles of a pair of double doors in order to prevent drafts.

Origin of astragal

1555–65; < Latin astragalus < Greek astrágalos a vertebra, the huckle-bone, a molding, a kind of vetch; in plural, dice (i.e., huckle-bones)

The style of carving of the cymatium with its astragal should be the Lesbian.

Ten Books on Architecture |Vitruvius
Fig. 265 is a rebated joint with loose tongue-slip and astragal mould, suitable for frames over 11⁄4 in.

Woodwork Joints |William Fairham
An enlarged section of the astragal mould which is grooved to fit on the bar which forms the rebate is also shown.

Woodwork Joints |William Fairham
It is distinguished from the astragal because it casts less of a shadow above and below.

Carpentry for Boys |J. S. Zerbe

At the bottom the capital should be of the thickness of the top of the column omitting the congé and astragal.

Ten Books on Architecture |Vitruvius

astragal

/ (ˈæstrəɡəl) /

architect

Also called: bead a small convex moulding, usually with a semicircular cross section
a moulding having the form of a string of beads

carpentry a glazing bar, esp in a bookcase

anatomy the ankle or anklebone

C17: from Latin astragalus, from Greek astragalos anklebone, hence, small round moulding