A Geometric term. A figure formed by two lines diverging from a common point or, two planes diverging from a common line.
Carriages Circular Stair Closed Stringers Cove Molding Curved Stair Cut Jacks Dextral Stair Dogleg Easing/ Easement False End Treads Fillet Finial Fittings Flight of Stairs Flitch Flutes Geometry
Glue Blocks Going-run Gooseneck Guardrail Hand Handrail Handrail Height Headroom Helical Stair Horse Housed Stringer Jack Kicker Plate Landing Landing Newel Landing Tread