Definition of "ferricyanide" [fer•ri•cy•a•nide]

• Any of various salts containing the negative trivalent radical Fe(CN)6 and used in making blue pigments. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Irradiation of melanin for 20 min increased the velocity of the NADH/ferricyanide coupled reaction 3-fold in comparison to that measured for non-irradiated melanin, while 40 min irradiation had an even larger effect, causing a 4-fold increase in velocity (Table 1)."
• "The excitement of exposing and watching a print develop and then working on the print with ferricyanide after the fix kept my eyes occupied."
• "He was also known to print images down to black and use potassium ferricyanide or bleach to reveal only the areas he wished to show."