athanor

[ath-uh-nawr]

noun Alchemy.

a digester furnace with a self-feeding fuel supply contained in a towerlike contrivance, ensuring a constant, durable temperature.

Origin of athanor

1425–75; late Middle English ≪ Arabic at tannūr the furnace

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

A, shows an athanor (or digesting furnace) and a couple of digesting vessels.
Alchemy: Ancient and Modern
H. Stanley Redgrove
The draught affects the furnace—my Athanor, as we adepts term it.
Auriol
W. Harrison Ainsworth
We know of the athanor of the alchemists of the middle ages.
Inventions in the Century
William Henry Doolittle
Or Athanor, a chemical stove, which works on for a long time without poking.
Titan: A Romance v. 1 (of 2)
Jean Paul Friedrich Richter