Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A constant, equal to 8.314 joules per Kelvin or 1.985 calories per degree Celsius, that is the constant of proportionality (R) in the equation Pressure × Volume = n (number of moles) × (R) × Temperature, relating the pressure and volume of a quantity of gas to the absolute temperature.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a universal constant, R, that appears in the ideal gas law, (PV = nRT), derived from two fundamental constants, the Boltzman constant and Avogadro's number, (R = NAk)

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole

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