: a complex salt containing varying amounts of iron and used especially for making blueprints
Word History
First Known Use
circa 1924, in the meaning defined above
Medical Definition
ferric ammonium citrate
noun
: a complex salt of indefinite composition that contains varying amounts of iron, that is obtained as red crystals or a brownish yellow powder or as green crystals or powder, and that was formerly used in medicine for treating iron-deficiency anemia