The Collaborative International Dictionary
Fettling
Fettling \Fet"tling\, n.
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(Metal.) A mixture of ore, cinders, etc., used to line the hearth of a puddling furnace. [Eng.]
Note: [It is commonly called fix in the United States.]
(Pottery) The operation of shaving or smoothing the surface of undried clay ware.
Wiktionary
fettling
n. 1 (context UK English) A mixture of ore, cinders, etc., used to line the hearth of a puddling furnace. 2 The operation of shaving or smoothing the surface of undried clay ware. vb. (present participle of fettle English)