Louvre.—A turret raised above a roof for the escape of smoke.
Machicolation.—The corbelling out of the parapet of a building, forming openings through which missiles could be discharged on the heads of an attacking force.
Maunch.—The heraldic term for a sleeve.
Minstrels’ Gallery.—The gallery formed above the screen of a hall, sometimes occupied by minstrels.
Mitre (in Joinery).—The line formed by a sharp change (at right angles or otherwise) in the direction of a moulding.
Moulding.—The term applied to the contour, wrought into long hollows and projections, of the angles or edges of an architectural feature, such as a door, window, arch, panel, &c.
Mullion.—The vertical shaft or division between the lights of a window.
Nave.—The central portion of a church westward of the choir or chancel.
Newel.—In a circular stone staircase, the central column round which the steps wind. In a wooden staircase, the stout posts which carry the handrail and the string supporting the stairs.
Ogee.—A compound curve, partly concave and partly convex.