calefactory

US: (kal′ə fak′tə rē, -fak′trē)

WordReference Random House Unabridged Dictionary of American English © 2025

cal•e•fac•to•ry  (kal′ə fak′tə rē, -fak′trē), adj., n., pl. -ries. 
adj. 

1. serving to heat.

n. 

2. a heated parlor or sitting room in a monastery.

• Late Latin calefactōrius having a warming or heating power, equivalent. to Latin calefac(ere) to make warm (see calefacient) + -tōrius -tory¹
• 1530–40