D defs.my
Entry 2 senses Webster, 1913

Astragal

· As·tra·gal · IPA
01 n. A convex molding of rounded surface, generally from half to three quarters of a circle.
  1. 1.
    A convex molding of rounded surface, generally from half to three quarters of a circle.(Arch.)
  2. 2.
    A round molding encircling a cannon near the mouth.(Gun.)