ARCHITRAVE -- the molding around a door or window opening; also in classical architecture, the lowest member of the entablature resting on the capital of the column.

ASHLAR -- hewn masonry blocks having a square or rectangular face.

BALCONET -- a false balcony, with a railing but little floor space.

BALCONY -- a platform that projects from a wall and is enclosed by a railing.

BALLOON FRAMING -- a type of timber framing in which the studs run continuously from sill to eaves, with horizontal members nailed to them.

BALUSTER -- an upright support for a handrail.

BALUSTRADE -- a row of balusters topped by a hand rail.

BARGEBOARD -- a vertical board that is set under and follows the line of a gable, often decorated by carving; a vergeboard.

BAS-RELIEF -- a sculptured form with slight projection from its background

BATTER --  the receding upward slope of a wall or other inclined structure. BATTLEMENT -- a parapet, the top of which has alternating slots or openings.

BAY WINDOW -- a window or series of windows that project outward from a wall and from the ground upward

BAY -- an external division of a building marked by a window, door, column, or pier.

BEAMED CEILING -- a ceiling in which the rafters are a purposeful part of the design.

BELFRY -- the upper room in a bell tower.

BELLCAST -- a roof form, having an outward curve like the flare of a bell.

BELT COURSE -- a flat horizontal band of slight projection that marks the division of a wall surface.

BELVEDERE -- an open pavilion built to command a view, usually on top of a building.

BLUEPRINT -- a positive print with white lines on a blue background, used especially for copying maps and architectural plans.

BOARD-AND-BATTEN -- a type of wall construction where boards are positioned vertically with narrow wooden strips ((battens) covering the vertical joints.

BOW WINDOW -- a bay window, the face of which is an arc.

BRACKET -- a supportive member for a projecting structure, often decorative.

BREEZEWAY -- a roofed open passage connecting two buildings or parts of a building.

BROW ROOF -- an angled projection, usually covered with Spanish tile, that caps a parapet to simulate a roof.

BROKEN PEDIMENT -- a pediment whose sloping sides are returned on themselves before reaching the apex, leaving a space usually filled by a vase or other ornament.

BULKHEAD -- an upright construction to prevent earth from sliding into an excavation or body of water.

BUTTRESS -- an abutting pier that gives strength to a wall.

CAEN STONE -- a soft fine textured stone quarried near Caen, France, which is easily carved and hardens with exposure.

CAISSON -- a watertight chamber used in underwater construction as a workspace and/or the beginning of a foundation.

CAMPANILE -- a freestanding bell tower.

CANTILEVER -- a self-supporting projection that has no external bracing and freely extends beyond its support.

CAP -- the crowning feature of a pier, column, pilaster, or chimney; a capital.

CAPITAL -- the top member of a pier, column, or pilaster.

CARTOUCHE -- an ornamental panel, usually elaborately framed and bearing an inscription.

CASEMENT -- a window sash hung vertically, with hinges on its side.

CAST IRON -- an iron alloy which is cast in a mold, is brittle and nonmalleable, and is chiefly used for mass-produced parts.

CELTIC CROSS -- an early Christian ornament, featuring a cross with the upper portion enclosed in a circle.

CHAMFER -- to cut away the corner where two surfaces meet, leaving a beveled edge.

CHEVRON -- a decorative pattern or molding made up of zigzag lines.

CHIMNEY POT -- a short extension of a flue above the chimney wall.

CLAPBOARD -- an overlapping horizontal board that is thinner at the top edge than the bottom; weatherboard.

CLERESTORY -- the upper portion of a wall that is carried above the slope of the roof and pierced by windows to admit daylight.

CLIPPED GABLE -- a gable cut back at the peak to form a secondary slope; jerkinhead.

CLOISTER -- a covered passageway along the walls of a courtyard, usually having one side walled and the other an open arcade or colonnade.

COFFER -- a recessed panel in a ceiling, vault, or soffit.

COLLAR BEAM -- a horizontal tie between opposite rafters.

COLLAR --  a band or molding encircling a column or pier.

COLONNADE -- a series of regularly spaced columns, usually supporting the base of a roof.

COLUMN --  a supporting pillar.

COMMON BOND -- a pattern of brickwork with each sixth course containing headers.

COMPOSITE -- a Roman architectural order in which the columns combine elements of the Ionic and Corinthian orders.

CONCRETE BLOCK -- a square or rectangular building unit made of molded concrete.

CONSOLE -- an S-shaped ornamental bracket, whose height is usually greater than its width.

COQUINA -- a soft Floridian limestone formed by compressed marine shells and used for building.

CORBELING -- successive courses of wood or masonry which are stepped upward and outward from a wall surface.

CORINTHIAN -- a Greek order in which the column capitals display rows of acanthus leaves and the shafts are slender, sometimes fluted.

CORNICE -- a projecting ornamental molding along the top of a wall; in classical architecture, the upper projecting member of an entablature.

CORONA -- the vertically faced projection in the upper part of a cornice.

COURSE -- a horizontal row of bricks or masonry units throughout a wall.

CRENELATED -- having battlements,  a parapet in which the top is alternately and uniformly notched.

CRESTING -- an ornamental ridge for a roof, usually incised or having a series of finials.

CROCKET -- a leaf-shaped Gothic decorative ornament  which projects at intervals along the edge of a spire. CRUCIFORM -- arranged in the shape of a cross.

CRYPT -- a vaulted chamber wholly or partially underground.

CUPOLA -- a small dome on a circular or polygonal base crowning a roof or turret.

CUT NAIL -- a nail cut out of an iron sheet, as contrasted with a wire nail.

DENTIL -- one of a series of small projecting blocks forming a molding, often under a cornice.

DENTILLED -- bearing dentils as ornamentation.

DOGTROT -- a roofed passage joining two parts of a house; a breezeway.

DOME -- a hemispherical roof or ceiling.

DORIC -- a classic architectural order in which the columns have simple rounded capitals, shallow fluting, and often no base.

DORMER -- a minor gable in a pitched roof, usually having a window or windows on its front.

DOUBLE-HUNG WINDOW -- a window having two sashes, one sliding vertically in front of the other.

DOWNSPOUT -- a vertical pipe to conduct water from an eaves gutter to the ground.

DROP SIDING -- an exterior wall-covering of horizontal boards, each with a recessed notch across its bottom edge to overlap the next board.

DUTCH BOND -- see English bond.