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Definition of Reaumur scale
1. Noun. A temperature scale on which water freezes at 0 degrees and boils at 80 degrees.
Generic synonyms: Temperature Scale
Medical Definition of Reaumur scale
1. A thermometer scale in which each degree Reaumur (°R) is 1/80 of the temperature difference between the freezing point and boiling point of pure water at 1 atmosphere pressure, with 0°R set at the freezing point and 80°R set at the boiling point of water. (05 Mar 2000)