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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



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.


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.

solar collector

A device designed to absorb radiation from the sun and transfer this energy to a fluid which passes through the collector.


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.


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.
References in periodicals archive ?
At the Port of Manila (POM), lawyer Vener Baquiran was appointed district collector; Ernelito Aquino, acting deputy collector for operations; Ramon Anquilan, deputy collector for assessment; Gerardo Macatangay, deputy collector for administration; and Antonio Meliton Pascual, chief of the formal entry division.
Problems with the information that collectors receive when they are hired or they purchase debt, combined with the lack of information provided by collectors to consumers during collections, can cause substantial consumer harm.
Mindful of UNESCO'S anti-market bias, however, they included in the CPIA measures to protect dealers, collectors, and museums.
Under a spotlight in the basement, printed on a sheet of paper about the size of a postcard, was a three-column list of artists' works that one collector keeps in storage.
One of the defining qualifications of a collector car is appreciation, reports Hagerty.
A general doll-collectors site, Dolls International Prestige Collectors Club, can be found at http:/www.
Many of the control systems installed have a serious problem with the buildup of flammable materials in the hoods, duct systems and collectors.
The Dowlings moved to dismiss the petition claiming that the landlord violated FDCPA by serving the rent demand and the petition, both of which instruments, although signed by the landlord, were prepared by the attorney for the landlord, but they did not contain the validation notice required of a debt collector by FDCPA.
CM BRIDDGE is a resource for collectors to develop strategies to enhance and to plan for the future of any type of art collection.
The controversy fueled a long-standing feud between commercial fossil collectors and academic researchers, who see themselves as competitors for a limited resource.