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PART II

GLOSSARY

A

Aisle

Subsidiary space alongside the body of a building, separated from it
by columns, piers, or posts.
Apron

1. raised panel below a window or wall monument or tablet.
2. open portion of a marine terminal immediately adjacent to a vessel
berth, used in the direct transfer of cargo between the vessel and the termi-

nal.
3. concrete slab immediately outside a vehicular door or passageway
used to limit the wear on asphalt paving due to repetitive turning move-

ments.
Apse

Vaulted semicircular or polygonal end of a chancel or chapel.
Arcade
Passage or walkway covered over by a succession

of arches or vaults supported by columns. Blind arcade or arcading: the
same applied to the wall surface.
Arch

A curved structure capable of spanning a space while supporting sig-
nificant weight.
Architrave

Formalized lintel, the lowest member of the classical entablature. Also
the moulded frame of a door or window (often borrowing the profile of a
classical architrave).

Arris
Sharp edge where two surfaces meet at an angle.

Arrowslit
A thin vertical aperture in a fortification through which an archer can
launch arrows.

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