muffle furnace

noun

Definition of muffle furnace

: a furnace having its charge inside a muffle and the source of heat outside so that the charge has no contact with the flame

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“Muffle furnace.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/muffle%20furnace. Accessed 19 Oct. 2020.

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