noun
: a black pigment: as
a. : one made by grinding carbonaceous shale or slate
b. : a natural pigment containing graphite
c. : black iron oxide
noun
: a black pigment: as
a. : one made by grinding carbonaceous shale or slate
b. : a natural pigment containing graphite
c. : black iron oxide
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012