from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An ester of phosphoric acid containing two phosphate groups.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. any salt or ester containing two phosphate groups
- n. any salt or ester of diphosphoric acid; pyrophosphate
from The Century Dictionary and Cyclopedia
- n. In chem., a compound containing two combining units of the radical of phosphoric acid.
Sorry, no etymologies found.