myEtymology.com: English etymology of calefactory

Etymology of the English word calefactory

the English word calefactory

derived from the Latin word calefactorius (that has a warming, heating power; warming)

derived from the Latin word calefactus (action of heating, warming; heated, warmed; excited)

derived from the Classical Latin word calefacere (make warm, hot)

derived from the Latin word calere (be, feel, be kept warm)

derived from the Proto-Indo-European root *kelə-

The earliest known usage of calefactory in English dates from the 16th century.