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1. a person employed to collect debts, rents, etc.
2. the head of a district administration in India
3. a person who collects or amasses objects as a hobby
4. Electronics the region in a transistor into which charge carriers flow from the base
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



in agricultural irrigation, a drainage pipe or canal that receives water from the regulating part of an irrigation network (drainage gutters) and sends it out of the area being drained.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


A semiconductive region through which a primary flow of charge carriers leaves the base of a transistor; the electrode or terminal connected to this region is also called the collector.
An electrode that collects electrons or ions which have completed their functions within an electron tube; a collector receives electrons after they have done useful work, whereas an anode receives electrons whose useful work is to be done outside the tube. Also known as electron collector.
A class of instruments employed to determine the electric potential at a point in the atmosphere, and ultimately the atmospheric electric field; all collectors consist of some device for rapidly bringing a conductor to the same potential as the air immediately surrounding it, plus some form of electrometer for measuring the difference in potential between the equilibrated collector and the earth itself; collectors differ widely in their speed of response to atmospheric potential changes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

solar collector

A device designed to absorb radiation from the sun and transfer this energy to a fluid which passes through the collector.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.


accumulatorclick for a larger image
accumulatorclick for a larger image
i. A reservoir that supplies fluid under pressure, when desired. In a typical hydraulic system, it consists of a steel cylinder closed at one end and connected to the pressure line at the other, as well as a floating piston. The piston separates hydraulic fluid from compressed nitrogen/air. Hydraulic fluid under pressure can be stored in the system. The accumulator reduces the pump's peak demands, dampens the pressure ripple, and acts as a reserve of fluid and an emergency power source.
ii. A device sometimes incorporated into the fuel system of a gas turbine engine to store and release fuel under pressure as an aid in starting. Also called a collector.
iii. A device for storing fuel in a fuel tank for inverted flying.
iv. In pneumatic and oxygen systems, the reservoir where compressed air or oxygen is stored.
v. An electrical storage battery that can be recharged.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved


One side of a bipolar transistor. When the base is pulsed, current flows from the emitter to the collector, or vice versa depending on the design. See drain.
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References in periodicals archive ?
Material examined.--CAR, Dzanga-Ndoki National Park, Lake 1, platform on the canopy 38m, "Azobe" Lophira alata, Ochnaceae, UV trap 06.11.2012 ([male]) (Collector NM) (RCNM); Lake 1, platform on the canopy 38m, "Azobe" Lophira alata, Ochnaceae, UV trap 08.11.2012 ([male]) (Collector NM) (RCNM); Lake 1, clearing in the forest, UV trap 09.11.2012 (2[male]) (Collector NM) (RCNM); Lake 3, UV trap 22.11.2012 ([male]) (Collector NM) (RCNM); Lake 1, platform on the canopy 45m, "Ayous" Triplochiton scleroxylon, Sterculariaceae, UV trap 24.11.2012 ([male]) (Collector NM) (RCNM).
To evaluate the potential of vacuum glazing application in solar thermal collector design, detailed simulations for three different variants of the collector cover glazing have been carried out.
Collector (adjudication) Collectorate of Customs, Islamabad, Superintendent Investigation and prosecutor Model Custom Collectorate Islamabad, Assistant Collector investigation and Prosecution, appellate tribunal customs sales tax and federal excise and state as respondents.
Closed-loop systems consist of insulated piping filled with nontoxic, water-diluted antifreeze (often called "solar fluid"), a collector array, a circulating pump, an expansion tank, a solar hot water storage tank, a heat exchanger, and a controller, in addition to valves and gauges (see illustration, right).
The agency said the rules it plans to issue would require collectors to verify detailed information about a person before contacting them about a debt.
Kemper Signs Marketing Agreement With Hagerty for Classic Collectors Vehicle Biz
"Hagerty is a great partner in that they're fully committed to the classic collector market and the agents that serve the market, and share our dedication to customer satisfaction," said Duane Sanders, president of Kemper's Property and Casualty Division.
Three suspects already in Police custody, including a businessman in connection with attack on Deputy Collector Customs, after an FIR was launched.
Arsenia Ilagan, the former district collector at the Port of Legazpi, was named district collector at the Port of Manila.
Lawyer Romalino Valdez was assigned as Acting District Collector of the Port of Batangas while Atty.
Gregorio has been reassigned as the new acting district collector of the Port of San Fernando, La Union.