noun
: any of several black pigments sometimes in the form of drops or pellets: as
a. : frankfort black
b. : bone black especially when reclaimed after use as a decolorizing agent
noun
: any of several black pigments sometimes in the form of drops or pellets: as
a. : frankfort black
b. : bone black especially when reclaimed after use as a decolorizing agent
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012