noun
: a pigment that is produced from an iron salt (as copperas) by precipitation or calcination under controlled conditions and is often purer than natural iron oxides
noun
: a pigment that is produced from an iron salt (as copperas) by precipitation or calcination under controlled conditions and is often purer than natural iron oxides
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012