electro-, electr-, electri-

The accumulation of electrons in imperfections in the silicon dioxide of erasable, programmable memories which permits negative charges to buildup and to delay the erasure of that memory instrument.

1. An electron tube consisting of a sealed glass or metal enclosure from which the air has been withdrawn.

It was used in early electronic circuitry to control a flow of electrons.

2. An electronic instrument which consists, typically, of a sealed glass bulb containing two or more electrodes.

It is used to generate, to amplify, and to rectify electric oscillations and alternating currents.

A relay which employs electronic tubes as components.

1. The tuning of a transmitter, receiver, or other tuned equipment by changing a control voltage rather than by adjusting or switching components manually.
2. Altering the frequency of a reflex klystron oscillator by changing the repeller voltage.
3. Frequency changing in a transmitter or receiver by changing a control voltage rather than the circuit components.

A klystron is a term referring to an electron tube used to generate or to amplify electromagnetic radiation in the microwave region by velocity modulation.

The frequency range of continuous tuning, between two operating points of specified minimum power output, for an electronically tuned oscillator.

The rate of change in oscillator frequency with changes in electrode voltage or current for an electronically tuned oscillator.

1. The recording of video images by means of photographic film, or magnetic tape or disk, so the image's record can be played back in a video format at a later time.
2. The process of recording color signals onto photographic film as black and white coded images.
3. The recording of black and white or color television visual signals on a reel of photographic film including coded black and white images.

1. A small TV screen attached to a video camera that allows the operator to view a given scene exactly as it is being viewed by the camera.
2. A small television camera which replaces the reflex viewfinder of a motion picture camera.

Such a viewfinder allows the image being photographed to be viewed simultaneously by several people because the TV image may be transmitted to several receivers.

1. An instrument that maintains the direct-current power supply voltage for electronic equipment which is nearly constant in spite of the input alternating-current line voltage variations and output load variations.
2. A type of regulator that uses all solid state devices to perform the regulatory functions.

1. The voltmeter whose sensitivity is increased by amplification.
2. A voltmeter that uses the rectifying and amplifying properties of electron devices and their associated circuits to secure desired characteristics; such as, high-input impedance, wide-frequency range, crest indications, peak-to-peak indications, and so on.

It is called a "vacuum-tube voltmeter" when its electron devices are vacuum tubes.

An instrument that employs the characteristics of an electron-tune or a semiconductor circuit for the measurement of voltage and resistance on a single-calibrated scale.

1. That division of electronic military warfare involving actions which are taken to search for, intercept, locate, record, immediately identify radiated electromagnetic energy, and to analyze radiated electromagnetic energy for the purposes of exploiting such radiations in support of military operations.
2. A division of electronic warfare involving actions ordered by, or under direct control of, an operational commander to search for, intercept, identify, and to locate sources of intentional and unintentional radiated electromagnetic energy for the purpose of immediate threat recognition.

An electronic warfare support that provides information which is required for immediate decisions or actions involving electronic counter measures, electronic counter-countermeasures, avoidance, targeting, homing, warfare operations, and other tactical military employment of forces.

1. Military procedures involving the use of electromagnetic energy to determine, exploit, reduce, or to prevent the hostile use of the electromagnetic spectrum, and action which retains friendly use of electromagnetic spectrum.
2. Military action involving the use of electromagnetic and directed energy to control electromagnetic spectrum or to attack a military enemy.

Electronic warfare consists of three divisions: electronic attack, electronic protection, and electronic warfare support.

3. The use of an electromagnetic spectrum by using devices to attack enemy personnel and equipment or to defend against these procedures and techniques.
4. A military action intended to prevent the use of electromagnetic radiation by hostile forces or to keep and to exploit its use by friendly forces.

Electronic warfare includes electronic countermeasures and counter-countermeasures.

Any broken or unwanted electrical or electronic appliances which have become items of concern because of the components are considered toxic and are not biodegradable: The city where Sally lives recently started a recycling program for electronic wastes of cell phones and computers.

1. A watch based on a quartz crystal or a tuning fork with battery-powered electronic circuits to provide greater accuracy than is possible with conventional spring-type mechanical movements.
2. A timepiece in which a battery replaces the mainspring, and the semiconductor elements replace the mechanical switching-contact arrangement.