Notice: Trying to get property 'text' of non-object in /home/b70ba15/public_html/dictionarywebster.com/view.php on line 298
red mud
nounDefinition of red mud
1
: a marine offshore deposit deriving its yellow-brown to red-brown color from iron oxide
red mud … is most prevalent in the Yellow sea and off the coasts of Brazil— F. C. Lane
— compare blue mud
2
: a residue high in iron oxide resulting from purification of alumina in the Bayer process