Definition of pyrosulfuric acid
: an unstable, crystalline acid H2S2O7 that is usually handled commercially as a thick oily fuming liquid, that is formed by the union of sulfur trioxide with sulfuric acid, that is a chief component of fuming sulfuric acid, and that is converted to sulfuric acid when mixed with water —called also disulfuric acid — compare oleum
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!
Origin and Etymology of pyrosulfuric acid
International Scientific Vocabulary pyr- + sulfuric
Seen and Heard
What made you want to look up pyrosulfuric acid? Please tell us where you read or heard it (including the quote, if possible).