calefactory

noun cal·e·fac·to·ry \ˌka-lə-ˈfak-t(ə-)rē\

plural cal·e·fac·to·ries

Definition of CALEFACTORY

: a monastery room warmed and used as a sitting room

Medieval Latin calefactorium, from Latin calefacere to warm — more at chafe

First Known Use: circa 1681

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