Réaumur scale
/ˈreɪə(ʊ)ˌmjʊə
/noun
An obsolete scale of temperature at which water freezes at 0° and boils at 80° under standard conditions.The Réaumur scale saw widespread use in Europe, particularly in France and Germany as well as Russia....
- Use of the Réaumur scale was once widespread, but by the late 19th century it had been supplanted by other systems.
Origin
Late 18th century: named after René A. F. de Réaumur (1683–1757), French naturalist.