stovepipe

Sheet-metal tubing used as a chimney for a stove or furnace.

On the Visby-Västerhejde Railway there is a steam car. [...] The upperworks consist of a short clerestory coach body with end platforms and the engine chimney protruding from the roof like a stovepipe.

Glass windows replaced the old tiny windows of selenite (crystallized gypsum), and stovepipe replaced adobe chimneys.

A channel for information which is compartmentalized in such a manner that some parties who might be interested in its use or able to make use of it are restricted from accessing it.

A stovepipe hat.

I'm sure the Brunel-designed stone-built structure would have had a hatstand for his trademark stovepipe. I can picture him rocking up there of a morning and lobbing it nonchalantly onto the hatstand.

A type of malfunction affecting breechloading firearms, where a spent cartridge casing fails to eject completely, instead becoming stuck in the firearm's ejection port, usually oriented vertically or nearly so.

A trench mortar such as the Stokes mortar.

To collect or store (information) in a compartmentalized manner, so that some parties who might be interested in its use or able to make use of it are restricted from accessing it.

Of a cartridge case, to become wedged vertically in the ejection port of a breechloading firearm, rather than ejecting completely from the weapon.