Réaumur

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Ré·au·mur / ˌrāōˈmyoŏr/ (abbr.: ) • adj. of or denoting a scale of temperature on which water freezes at 0° and boils at 80° under standard conditions.• n. (also Réaumur scale) this scale of temperature.ORIGIN: 1730s: named after René-Antoine Ferchault de Réaumur (1683–1757), French physicist.