corner bead, angle bead, angle staff, corner guard, corner molding, plaster bead, staff bead
1. Any vertical molding, usually a plain, filleted, or quirked bead, used to protect the external angle of two intersecting surfaces.
2. A strip of formed galvanized iron, sometimes combined with a strip of metal lath, placed on corners before plastering to reinforce them.
plaster bead, plaster head, plaster staff
A metal angle bead that is a built-in edging, reinforcing a plaster angle; a corner bead.