Definition of Rankine scale

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Ran·kine scale    (rngkn) KEY 

NOUN:

A scale of absolute temperature using degrees the same size as those of the Fahrenheit scale, in which the freezing point of water is 491.69° and the boiling point of water is 671.69°.

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ETYMOLOGY:
After William John Macquorn Rankine (1820-1872), Scottish engineer and physicist