Definition of phosphorus heptasulfide
: a yellow crystalline compound P4S7 made by heating a mixture of phosphorus and sulfur in a ratio of about 4 to 7 equivalents, regarded formerly as a trisulfide, and used chiefly in the synthesis of organic sulfur compounds (as thiophene); tetra-phosphorus heptasulfide
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of phosphorus heptasulfide
heptasulfide from hepta- + sulfide
Seen and Heard
What made you want to look up phosphorus heptasulfide? Please tell us where you read or heard it (including the quote, if possible).