Definify.com
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.