from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A derivative of phosphoric acid containing two phosphate groups.

from The Century Dictionary.

  • noun In chem., a compound containing two combining units of the radical of phosphoric acid.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun chemistry any salt or ester containing two phosphate groups
  • noun chemistry any salt or ester of diphosphoric acid; pyrophosphate


Sorry, no etymologies found.


  • ATP (adenosine triphosphate) and ADP (adenosine diphosphate), the main energy carriers in living cells, and he determined the structure of vitamin B12 (cf. Section 3.5) and of FAD

    The Nobel Prize in Chemistry: The Development of Modern Chemistry

  • ATP is created from adenine diphosphate using the energy released during glucose metabolism.

    Physiological chemicals

  • ADP adenosine diphosphate is converted to ATP in the mitochondria.

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  • Chemically, they function like batteries that pump charged particles across an inner membrane where the energy is captured by converting a molecule called adenosine diphosphate (ADP) into a higher-energy form called adenosine triphosphate (ATP).

    Analog Science Fiction and Fact

  • Because of the asymmetry of the rotating axle, three subunits of the enzyme assume different forms and functions: a first form that hinds adenosine diphosphate (or ADP) and phosphate building blocks, a second form where these two molecules are chemically combined into a new ATP molecule, and a third form where the ATP that has been formed is released.

    The Nobel Prize in Chemistry 1997 - Presentation Speech

  • Boyer and his co-workers have proposed, on the basis of biochemical data, a mechanism for how ATP is formed from adenosine diphosphate (ADP) and inorganic phosphate.

    Press Release: The 1997 Nobel Prize in Chemistry

  • The removal of the terminal phosphate group from ATP produces adenosine diphosphate (ADP).

    The Nobel Prize in Chemistry 1997

  • On removal of the outermost phosphate group, adenosine diphosphate (ADP) is formed while at the same time the energy released can be employed for other reactions.

    Press Release: The 1997 Nobel Prize in Chemistry

  • Equivalence for salt and base: 130 mg sulphate = 150 mg phosphate or diphosphate = 100 mg base 200 mg sulphate = 250 mg phosphate or diphosphate = 150 mg base

    Chapter 4

  • This activation leads to the removal by hydrolysis water action of a phosphate from the triphosphate GTP to leave the diphosphate GDP.

    Alcohol and The Addictive Brain


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