All Words Glossary

Glossary of Electricity Terms
beginning with letter R
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R Tweet Definition of R Like Definition of R on Facebook
  1. The eighteenth letter of the Appendix:Roman script, English alphabet, preceded by Q and followed by S.
  1. (context, US politics) Republican
    1. (film certification) restricted
    2. reverse
    3. right (as opposed to left)
    4. (context, handbells) ring
    5. (context, baseball, cricket) The statistic reporting the number of runs scored by a player
    6. Thursday
radio wave Tweet Definition of radio wave Like Definition of radio wave on Facebook
  1. (physics) electromagnetic radiation having a wavelength between about .5 centimeters and 30,000 meters; used for the broadcasting of radio and television signals.
reactance Tweet Definition of reactance Like Definition of reactance on Facebook
noun (symbol X)
  1. (context, physics, electric) opposition to the change in flow of current in an alternating current circuit, due to inductance and capacitance; the imaginary part of the impedance
reactive Tweet Definition of reactive Like Definition of reactive on Facebook
  1. that reacts or responds to a stimulus
  2. (chemistry) that readily takes part in reactions
francium is the most reactive of the alkali metals.
  1. (electronics)Characterized by induction rather than capacitance.
  2. Reacting to the past rather than anticipating the future, not predictive.
receptacle Tweet Definition of receptacle Like Definition of receptacle on Facebook
  1. A container
  2. Botanical term for that part of the flower stalk (peduncle or pedicel) to which the floral parts are attached; also torus.
  1. In the Asteraceae, the end of the peduncle to which all of the florets of the flower head are attached.
    1. (electrical) US -- a contact device installed at an outlet for the connection of an attachment plug and flexible cord to supply portable equipment or appliances.
rechargeable Tweet Definition of rechargeable Like Definition of rechargeable on Facebook
  1. able to be recharged, especially of a battery that can be recharged from mains electricity via a charger
rectifier Tweet Definition of rectifier Like Definition of rectifier on Facebook
  1. something that rectifies
  2. a device that converts alternating current into direct current; often a diode
rectify Tweet Definition of rectify Like Definition of rectify on Facebook
verb (rectif, i, ed)
  1. (transitive) To correct or amend something.
  2. (transitive, chemistry) To purify or refine, especially by distillation.
  3. (transitive, electronics) To convert alternating current into direct current.
  4. (transitive) To add water to alcoholic spirit to adjust its proof.
regulator Tweet Definition of regulator Like Definition of regulator on Facebook
  1. A device that controls or limits something.
The voltage stopped working and the resulting overload destroyed the device.
  1. A person or group that sets standards of practice, especially those established by law.
relay Tweet Definition of relay Like Definition of relay on Facebook
  1. (electronics) An electrical actuator that allows a relatively small electrical voltage or current to control a larger voltage or current.
  2. (context, athletics) A track and field discipline where runners take turns in carrying a baton from start to finish. Most common events are 4x100 meter and 4x400 meter competitions.
  1. to verbally pass information from one person to another, to speak
reluctance Tweet Definition of reluctance Like Definition of reluctance on Facebook
  1. unwillingness to do something
  2. hesitancy in taking some action
  3. (physics) that property of a magnetic circuit analogous to resistance in an electric circuit
resonance Tweet Definition of resonance Like Definition of resonance on Facebook
  1. The condition of being resonant.
  2. Something that evokes an association, or a strong emotion.
  3. (physics) The increase in the amplitude of an oscillation of a system under the influence of a periodic force whose frequency is close to that of the system's natural frequency.
  4. (context, nuclear physics) A short-lived subatomic particle that cannot be observed directly.
    • 2004: When experiments with the first "atom-smashers" took place in the 1950s to 1960s, many short-lived heavier siblings of the proton and neutron, known as "resonances", were discovered. " Frank Close, Particle Physics: A Very Short Introduction (Oxford 2004, p. 35)
      1. An increase in the strength or duration of a musical tone produced by sympathetic vibration.
      2. (chemistry) The property of a compound that can be visualized as having two structures differing only in the distribution of electrons.
      (rfc, reword/combine definitions - should be three?)
rheostat Tweet Definition of rheostat Like Definition of rheostat on Facebook
  1. An electrical resistor, with two terminals, whose resistance is continuously variable by moving a knob or slider
rotary Tweet Definition of rotary Like Definition of rotary on Facebook
noun (rotaries)
  1. a traffic circle
  2. an international club for community service
  1. having rotation
A engine revolves the heads rather than having pistons go back and forth.
rotor Tweet Definition of rotor Like Definition of rotor on Facebook
  1. A rotating part of a mechanical device, for example in an electric motor, generator, generator, alternator or pump.
  2. The wing of a helicopter or similar aircraft

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