Drain (redirected from Penrose drain)

drain

One side of a field effect transistor. When the gate is pulsed, current flows from the source to the drain, or vice versa depending on the design. See collector.

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drain

1. a pipe or channel that carries off water, sewage, etc.

2. Surgery a device, such as a tube, for insertion into a wound, incision, or bodily cavity to drain off pus, etc.

3. Electronics the electrode region in a field-effect transistor into which majority carriers flow from the interelectrode conductivity channel

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drain [drān]

(civil engineering)

A channel which carries off surface water.

A pipe which carries off liquid sewage.

(electricity)

current drain

(electronics)

The region into which majority carriers flow in a field-effect transistor; it is comparable to the collector of a bipolar transistor and the anode of an electron tube.

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drain

1. Any pipe in a building-drainage system which carries waste water or water-borne waste.

2. Any pipe or channel for carrying waste water or storm water.

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(jargon)

drain - (IBM) To allow a system to complete the processing of its current work before the system becomes unavailable. E.g. draining a device before taking it off-line or telling a web server in a server farm not to accept any new requests but to finish processing any requests it has already accepted.

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Drain 

an artificial underground channel (pipe, cavity) for collecting and discharging subsoil waters and for aerating soil. Drains differ according to function (driers, collecting mains), structure, and materials. Pipes are made of such materials as earthenware, wood, and plastic. Cavities are of the mole or the slotted type, filled with gravel or fascines.