ammonium dichromate

noun

: a crystalline compound (NH4)2Cr2O7 used as a coloring agent in pyrotechnics and formerly in photographic development to enhance certain colors

called also ammonium bichromate

Word History

First Known Use

1872, in the meaning defined above

Time Traveler
The first known use of ammonium dichromate was in 1872

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 ammonium dichromate

Cite this Entry

“Ammonium dichromate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ammonium%20dichromate. Accessed 5 Nov. 2024.

Love words? Need even more definitions?

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