Word not found in any official scrabble dictionaries.
"Stup" Definition
noun
A pulverized mixture of clay and coke or coal.
Source: Century Dictionary
The soot which deposits in the flues of furnaces for the extraction of mercury from cinnabar. It contains a considerable proportion of mercury, partly free and partly combined; it is therefore mixed with lime, molded into brick-like masses, and reburned to recover the metal.
Source: Century Dictionary
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