microcosmic salt


: a white crystalline salt NaNH4HPO4.4H2O that is obtained by mixing solutions of sodium phosphate and ammonium phosphate or chloride, that is changed to a sodium phosphate glass on heating, and that is used as a flux like borax in beads for testing for metallic oxides and salts; sodium ammonium hydrogen phosphate

Word History


translation of New Latin sal microcosmicus; from the fact that it was originally obtained from human urine

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 microcosmic salt

Cite this Entry

“Microcosmic salt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microcosmic%20salt. Accessed 13 Jun. 2024.

Love words? Need even more definitions?

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