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A tall, slender tower attached to a mosque and surrounded by one or more projecting balconies; frequently charted as landmarks.

Related Terms

PLATE TOWER

A distillation tower along the internal height of which is a series of transverse plates (bubble-cap or sieve) to force intimate contact between downward flowing liquid and upward flowing vapor.

PLATE EFFICIENCY

The equilibrium produced by an actual plate of a distillation column or countercurrent tower extractor compared with that of a perfect plate, expressed as a ratio.

NATURAL-DRAFT COOLING TOWER

A cooling tower that depends upon natural convection of air flowing upward and in contact with the water to be cooled.

MECHANICAL-DRAFT COOLING TOWER

Cooling tower that depends upon fans for introduction and circulation of its air supply.

LOOKOUT TOWER

In marine operations, any tower surmounted by a small house in which a watch is habitually kept, as distinguished from an observation tower in which no watch is kept.

HEIGHT OF TRANSFER UNIT

A dimensionless parameter used to calculate countercurrent sorption tower operations; it is proportional to the apparent resident time of the fluid. Abbreviated HTU.

BELL BUOY

A buoy with a skeleton tower in which a bell is fixed

OBSTRUCTION LIGHT

A light indicating a radio tower or other obstruction to aircraft.

LOOKOUT STATION

A label on a nautical chart which indicates a tower surmounted by a small house from which a watch is kept regularly.

CUPOLA

A label on a nautical chart which indicates a small dome- shaped tower or turret rising from a building.

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