
1) Alchemical tool 2) Furnace
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https://www.crosswordclues.com/clue/athanor

1) Furnace
Found on
https://www.crosswordclues.com/clue/athanor

In alchemy, an athanor is a furnace used to provide a uniform and constant heat for alchemical digestion. The athanor was also called Piger Henricus (`Slow Harry`), because it was chiefly used in slower operations, and because when once filled with coals, it keeps burning a long time. For this reason the Greeks referred to it as `giving no trou......
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http://en.wikipedia.org/wiki/Athanor

alchemist's self-feeding digesting furnace
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http://phrontistery.info/a.html

• (n.) A digesting furnace, formerly used by alchemists. It was so constructed as to maintain uniform and durable heat.
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http://thinkexist.com/dictionary/meaning/athanor/
Ath'a·nor noun [ French, from Arabic
at- tannūr , from Hebrew
tannūr an oven or furnace.] A digesting furnace, formerly used by alchemists. It was so constructed as to maintain uniform and durable heat.
Chambers. Found on
http://www.encyclo.co.uk/webster/A/138
noun a furnace that feeds itself so as to maintain a uniform temperature; used by alchemists
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https://www.encyclo.co.uk/local/20974

a digester furnace with a self-feeding fuel supply contained in a towerlike contrivance, ensuring a constant, durable temperature.
Found on
https://www.infoplease.com/dictionary/athanor
No exact match found.