athanor

noun
ath·​a·​nor | \ ˈathəˌnȯ(ə)r\
plural -s

Definition of athanor

: a self-feeding digesting furnace that maintained a uniform and durable heat and was used by alchemists

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History and Etymology for athanor

Middle English, from (assumed) Medieval Latin, from Arabic at-tannūr the oven, from Aramaic tannūr oven

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