electro-, electr-, electri-

1. A screw, a soldering lug, or other point to which connections can be made to allow the transmission or receptions of signals: Irving, the contractor, hired electricians to install the electric terminals in the new building.
2. The end of a line where signals are either transmitted or received, or a point along the length of a line where the signals are made available to an apparatus: Randy, the fired train conductor, attempted to disrupt the electric terminals at the railroad station so the trains could not run on time.

An instrument which utilizes an electrical precess to measure temperature; such as, a thermocouple or resistance thermometer.

A thermocouple is a thermoelectric device used to measure temperatures accurately, especially one consisting of two dissimilar metals joined so that a potential difference generated between the points of contact is a measure of the temperature difference between the points.

One junction is at the temperature to be measured, the second is at a fixed temperature. The electromotive force generated depends upon the temperature difference.

A British term for a "flashlight".

A means of transportation in which vehicles are powered by electric motors supplied with electricity from distant generating stations; for example, street cars, electric trolley buses, interurban railways, and rapid-transit lines.

Electricity is also used in the movement of vehicles in other ways, but these forms are not usually included in the category of electric traction; examples include, battery-powered electric automobiles, battery-propelled vans for city delivery or warehouse use, and modern diesel-electric locomotives in which the wheels are driven by electric motors powered by diesel engines.

Equipment from which all of the waves are electric or a two-part appliance that processes electrical signals: An electric transducer is a device that transforms one type of energy into another one; for example, a microphone, a photoelectric cell, or an automobile horn.

A temporary component of current and voltage in an electric circuit which has been disturbed: When using a vacuum switch to close or interrupt a circuit, an electric transient can be increased in the circuit, making the insulation of the course of electricity higher than the rated operation voltage.

Vehicle-type alarm systems can usually detect electric transients in such activities, as starting the engine or opening a door, which can initiate a courtesy light that indicates a disturbance in the circuit that can result in making a warning alert.

1. Tuning a receiver to a desired station by switching a set of preadjusted trimmer capacitors or coils into the tuning circuits.
2. The process of selecting a desired frequency on a component; such as, a receiver, a transmitter, or an oscillator, without using mechanical devices.

1. A defect occurring in natural quartz crystals, in which adjacent regions of quartz have their electric axes oppositely poled.

2. A defect in crystals in which two neighboring regions have antiparallel electric moments.

A typewriter having an electric motor that provides power for all operations initiated when the keys are touched.

A unit for measuring the strength of an electric current.

Three different systems of electric units are used:

• The electromagnetic unit.
• The electrostatic unit.
• The ordinary or practical units.

The commonly used practical units are the ampere or unit of current, the volt or unit of electromotive force, the ohm or unit of resistance, the coulomb or unit of quantity, the farad or unit of capacitance, and the watt or unit of power.

1. A vector which represents the force per unit charge acting on a positive charge in an electric field.
2. The force on a stationary positive electrical charge per unit charge at a point in an electric field.

It is usually measured in volts per meter.

1. A vehicle that is powered solely by an electrochemical power source; such as, a battery or a fuel cell.
2. Any ground vehicle whose original source of energy is electric power; such as, an electric car or an electric locomotive.

The movement of a visible, or invisible, stream of charged particles away from a body that has been charged to a sufficiently high voltage.

A single bare or insulated metallic conductor having solid, stranded, or tinsel construction, designed to carry current in an electric circuit.

1. The installation and utilization of a system of wire for the conduction of electricity.
2. A system of electric conductors and components for conveying electric power from a source to the point of use.

In general, electric wiring for light and power must convey energy safely and reliably with low power losses, and must deliver it to the point of use in an adequate quantity at a rated voltage.

Electric wiring systems are designed to provide a constant voltage to the load within the capacity limits of the system.