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Webster 1913 Edition

Wadd

{

Wad

,

Wadd

, }
Noun.
(Min.)
(a)
An earthy oxide of manganese, or mixture of different oxides and water, with some oxide of iron, and often silica, alumina, lime, or baryta; black ocher. There are several varieties.
(b)
Plumbago, or black lead.

Webster 1828 Edition

Wadd

WADD

,
Noun.
In mineralogy, a black wadd is a species of ore of manganese, of which there are four kinds; fibrous, ochery, pulverulent ochery, and dendritic. In some places, plumbago or black lead is called wad or wadd.

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