Badiaga \Bad`i*a"ga\ (b[a^]d`[i^][=a]"g[.a] or
b[.a]d*y[aum]"g[.a]), n. [Russ. badiaga.] (Zool.)
A fresh-water sponge {(Spongilla)}, common in the north of
Europe, the powder of which is used to take away the livid
marks of bruises.
[1913 Webster]