The portion of a chimney rising above the roof.

In gas works, a row of benches containing retorts.

A portion of a computer memory used to temporarily hold information, organized as a linear list for which all insertions and deletions, and usually all accesses, are made at one end of the list.

See <<pileup>>

1. To stand and rack drill rods in a drill tripod or derrick.

2. Any structure or part thereof that contains a flue or flues for the discharge of gases.

3. One or more filter cartridges mounted on a single column.

4. Tall, vertical conduit (such as smokestack, flue) for venting of combustion or evaporation products or gaseous process wastes.

5. The exhaust pipe of an internal combustion engine.

An erosional, coastal landform that is a steep-sided, pillarlike rocky island or mass that has been detached by wave action from a shore made up of cliffs; applies particularly to a stack that is columnar in structure and has horizontal stratifications. Also known as marine stack; rank.

The cone-shaped section of a blast furnace or cupola above the hearth and melting zone and extending to the throat.

To assign different altitudes by radio to aircraft awaiting their turns to land at an airport.