What is the meaning of R?

noun

  • A unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air.
  • Physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8. 3143 joules per kelvin per mole.
  • The 18th letter of the Roman alphabet.
  • The length of a line segment between the center and circumference of a circle or sphere.
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). r. Retrieved September 20, 2026, from http://smartdefine.org/r/definitions/1217740
ChicagoWordNet. 2010. "r" http://smartdefine.org/r/definitions/1217740 (accessed September 20, 2026).
HarvardWordNet 2010, r, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/r/definitions/1217740>.
MLAWordNet. "r" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/r/definitions/1217740>
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