Diphosphate
ahd-5
noun.
A derivative of phosphoric acid containing two phosphate groups.
The Century Dictionary and Cyclopedia
noun.
In
chem.
, a compound containing two combining units of the radical of phosphoric acid.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
any
salt
or
ester
containing two
phosphate
groups
noun.
any salt or ester of
diphosphoric acid
;
pyrophosphate