Engineering Dictionary
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An alphabetical listing of General terms and items. |
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The apex of a curtain wall or rampart.
Defences which were used to defend a fortification from the top of the walls. See brattice, crenel, hoard, machicolation, merlon, parapet and turret.
A tower projecting from the curtain wall of a castle, which provided both neighbouring wall towers and curtain wall with flanking fire. See curtain tower, flanking tower, mural tower.
(1) A walk way along the top of an enbankment of a rampart. Also known as a bailey walk. (2) A walk way situated behind a parapet. See bailey walk.
A courtyard of a castle, or the space between the lines of bastioned curtain walls. See bailey. (O.E. weard, guard).
A German term for a castle built on a bank or island of a river, making use of the water way in their defence. Their main purpose was to extract tolls from the trade being shipped on the water way. See water castle. (G. wasser, water; burg, castle).
A connecting tower or crossing wall tower of a Japanese castle, which ran along the ishigaki and was used by the defenders to protect the walls against assault. See yagura.
The largest kind of Japanese castle gateway, which consisted two story timber frame structure, where the lower story incorporated the entrance, and the upper story formed the connecting tower (from were the gateway derives its name).The style of the connecting tower is typical of a yagura but the lower story's timber is left unplastered, and the actual gate and surrounding timbers were often covered with strips or sheets of iron which improved their protection against battering and firing. See yagura mon.
A watch tower or bartizan.
A castle which used water defences of natural or artificial origin, or both. See wasserburg.
See lines of defence, moat.
A defensible gate which connected a castle to open water or a water way, which was used to supply a castle with stores, reinforcements and communications, especially useful in times siege.
The watts emanating from each square inch of heated surface area of a heater. Expressed in units of watts per square inch.
A narrow covered way between the rampart and the wall of a fortification.
A covered gallery provided with machicolations which ran around the perimeter of a castle of the Teutonic Knights, which was accessible from the chapel, the chapter-house, and the dormitories by staircases in the walls, from which the castle was defended. (Gr. wehr, defence; gang, passage).
A network of four resistances, an emf source, and a galvanometer connected such that when the four resistances are matched, the galvanometer will show a zero deflection or "null" reading.
A small door in the main gate of a fortification, which could be used without having to open the gate. See guighet, postern, sally port. (Fr. guichet).
In computer graphics, a defined area in a system not bounded by any limits; unlimited "space" in graphics.
See jambs.
A common natural material strong in both compression and tension
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Number of bits treated as a single unit by the CPU. In an 8-bit machine, the word length is 8 bits; in a sixteen bit machine, it is 16 bits.
A standard of unit measurement calibrated from either a primary or secondary standard which is used to calibrate other devices or make comparison measurements.
Fortifications. See breastwork, crownwork, detached work, earthwork, forework, hornwork, low artillery outworks, mainworks, outwork, salient work and siege works.
To record data in a storage device or on a data medium.
An iron alloy that is less brittle than cast iron Back to top |
