Jamb:
The top and two sides of a door or window frame which contact the door or sash; top jamb and side jambs.

Kickplate:
A protective plate applied on the lower rail of the door to prevent the door from being marred.

Knot:
Branch or limb embedded in the tree and cut through during lumber manufacturer; size is determined by averaging the maximum length and width.

Lineal Foot:
Having length only; used in measuring quantities of mouldings; "linear", "foot", or running foot; "lineal" usually designates non-specified lengths.

Lock Rail:
The intermediate rail of a door at lock height.

Lock Set:
A lockset, complete with trim, such as knobs, escutcheons or handles.

Low-E (Low Emissivity) Glass:
Glass which restricts the passage of radiant heat, in and out; a metal and metal oxide coating is either suspended between the two layers of glass, or affixed to one of the panes, separated by a small air space.

Medium Density Fiber-board (MDF):
The generic name for a panel manufactured from lignocellulosic fibers combined with a synthetic resin or other suitable binder and bonded together under heat pressure in a hot press by a process in which the entire bond is created by the added binder.

Millwork Retailers:
An organization that purchases millwork from the millwork jobber, wholesaler or commission man for subsequent sale to the ultimate user; also termed lumber and building materials dealer.

Modern Style:
A style of architecture, practically devoid of the traditional and incorporating the more recent construction techniques design and planning; simple structural planes and such construction techniques as post and beam, flat roofs and glass walls are emphasized.

Mortise-and-Tenon:
A joint formed by the end of one member being inserted into the mortise of the other member; the tenon may be secured in the joint by means of steel pins or nails (pinned mortise and tenon).

Mortise Lock:
A lock which is mortised into the edge of a door which (or Latch) combines the two functions normally required on a door; latching and bolting.

Moulding:
A relatively narrow strip of wood or other solid material, usually shaped to a curved profile throughout its length; used to accent and emphasize the ornamentation of a structure and to conceal surface or angle joints.

Mullion:
The upright or vertical member dividing the panels in a door; the vertical member of a sash, window or door frame between openings in a multiple opening frame; the mullion is known as the "mullion center"; frames are termed "mullions", "triples", or "quadruples", depending on whether they have one, two or three mullions respectively; in doors, sometimes "muntings".

Muntin:
A short "bar", horizontal or vertical extending from a bar to a stile, rail or another bar.

One-Step:
The jobber may sell directly to the builder and this is referred to as "one-step" distribution.

Opening:
A discontinuity in an exterior or interior wall to admit a door or window.

Overall Height:
A measurement that is typically the vertical measurement such as between the upper edge of the entrance head or cap and the extreme or lower edge of the door sill slope.

Overall Width:
A measurement that is typically the horizontal measurement such as between the outside casing or pilaster edges of a door.

Overhang:
A projection of 2nd floor joists beyond an exterior wall of the structure; projection usually 12 to 18 inches.

Ovolo:
A convex profile; usually a quarter section of a circle and similar to the profile of "quarter round".

Panel:
A wood surface within a surrounding frame; all panels have structural frames, the interstices of which are filled with sheets or fields called "panels"; the frame is necessary for adequate strength only with the panels occupying considerable more area than the frame; the panel may be raised above or recessed below the surrounding frame and set off from it by moulding or other decorative treatment; panel also refers to a sheet of plywood or thin lumber as well as to a section of a floor, wall, ceiling, or roof prefabricated of a large size and handled as a single unit in the operations of assembly and erection.

Panel Moulding:
A decorative moulding used in panel work.

Particleboard:
A formed panel consisting of particles of wood flakes, shavings, slivers etc. bonded together with a synthetic resin or other added binder; the particles are classified by sizes dried to a uniform moisture content, mixed with binder, matformed, compressed to density and then cured under controlled heat and pressure.

Passage Function:
Knob or lever set most commonly used in hallways where (Hall/Closet) a locking feature is not required.

Patio Door:
See French Door.

Pediment:
A low-pitched triangular entrance head or cap; triangle formed by sloping roof and horizontal cornice; also may apply to window and door openings.

Pitch:
Accumulation of resin in the wood cells in a more or less irregular patch; see Resin.

Plumb:
Exactly perpendicular or vertical; at right angles to the horizon or floor.

Plywood:
A crossbanded assembly of layers of veneer (thin layers of wood peeled from a long) or veneer in combination with a lumber core or plies joined with an adhesive. The grain of the adjoining veneer or plies is approximately at right angles; an odd number of plies is generally used; two types of plywood are recognized, "veneer plywood" (layers of veneers only) and "lumber core plywood (lumber core with veneers or plies bonded to it).

Prefabrication:
Essentially component building; this term is applied to an entire wall section as contrasted with a panel or part of the entire wall; also "manufactured".

Pre-Finished:
Millwork with an applied finish coating.

Prehung Door Unit:
A pre-cut and assembled unit consisting of a wood door with preparation for lock hardware that is hung on hinges in a wood frame; the wood frame includes the one or two piece jamb adjustable or as-ordered width as well as the door stop mouldings and casings (trim); also hinged interior wood door unit; door units other than conventionally hinged are also available.

Privacy Function:
Knob or lever set most commonly used in bathroom or Bed/Bath) bedroom; can be locked from the inside with a push button emergency release feature.

Push Plate:
A plate applied to the lock stile to protect the door against soiling and wear.

Pull Plate:
A plate applied to the lock stile to grab and pull the door open and also protect the door against soiling and wear.