iron blue

noun

1
2
: any of various strongly colored pigments that range in masstone from reddish blue to jet black and possess good hiding power, that are now usually made by bringing together solutions of ferrous sulfate, ammonium sulfate, and sodium ferrocyanide and oxidizing the white precipitate formed, that consist of complex compounds regarded as both ferrocyanides and ferricyanides containing positive ions (as ammonium and sodium ions), and that are used chiefly in blueprints, inks, laundry blues, paints and enamels, crayons, and linoleum: such as
a
: prussian blue
b
: turnbull's blue

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Dictionary Entries Near iron blue

Cite this Entry

“Iron blue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/iron%20blue. Accessed 7 Jun. 2023.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!