English: muffle furnace
Welsh: ffwrnais fwffwl
Subject: Gwastraff
Welsh definition: A type of electrically heated laboratory furnace used for drying substances or carrying out high-temperature reactions using controlled atmospheres such as the pyrolysis of organic materials. The furnace is insulated and typically operates at temperatures up to 1,200ºC.
Plural: ffwrneisiau mwffwl