1. a scale of absolute temperature in Fahrenheit degrees; the freezing point of water is 491.69 degrees and the boiling point of water is 671.69 degrees;
WordNet (r) 3.0 (2006):
Rankine scale
n 1: a scale of absolute temperature in Fahrenheit degrees; the
freezing point of water is 491.69 degrees and the boiling
point of water is 671.69 degrees