RÉAUMUR

Ré′au′mur″ (rā̍′ō′mụr″), a. Of or pertaining to René Antoine Ferchault de Réaumur; conformed to the scale adopted by Réaumur in graduating the thermometer he invented. — n. A Réaumur thermometer or scale.
☞ The Réaumur thermometer is so graduated that 0° marks the freezing point and 80° the boiling point of water. Frequently indicated by R. Cf. Centigrade, and Fahrenheit. See Illust. of Thermometer.