Webster's Revised Unabridged Dictionary · 1913

Badiaga

Badiaga (bad`iā"gȧ or bȧd*ya"gȧ) , noun

[Russ. badiaga.]

(Zoology) 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.