gas constant

British  

noun

1.  R.  Also called: universal gas constant.  the constant in the gas equation. It is equal to 8.31472 joules per kelvin per mole

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gas constant Scientific  

1. A constant, equal to 8.314 joules per mole degree Kelvin or 1.985 calories per mole degree Celsius, that is the constant of proportionality (R) in the universal gas law.

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Example Sentences

The next time you hear Alex Trebek say, “This letter is known as the ‘ideal’ or ‘universal’ gas constant,” your response is, “What is R?”

From New York Times