Definition of relative molecular mass in English:

relative molecular mass


  • The ratio of the average mass of one molecule of an element or compound to one twelfth of the mass of an atom of carbon-12.

    • ‘Hirudin, a 65 amino acid residue anticoagulant peptide with a relative molecular mass of 7000 Da purified from the leech Hirudo medicinalis, binds thrombin with high specificity and sensitivity.’
    • ‘Cyanoalanine synthase activity has been localized mainly to mitochondria and has an apparent relative molecular mass of 53 000 to 60 000.’
    • ‘Number of moles equals mass over relative molecular mass.’
    • ‘The resulting homogenates were clarified by high-speed centrifugation, and the resulting supernatants were used immediately for activity and relative molecular mass (M r) determinations.’
    • ‘With these diatomic molecules, there is an Avogadro's number of diatomic molecules in the amount of gas that is equivalent to the relative molecular mass.’