Definition of relative atomic mass in US English:

relative atomic mass


  • Another term for atomic mass
    • ‘A scientific conference in 1860 officially adopted a combined form of Dalton's and Avogadro's theories, and soon afterward chemists began creating an accurate compilation of relative atomic masses.’
    • ‘It is much more convenient in these cases to use relative atomic masses.’
    • ‘They vary in relative atomic mass from 139 to 175 (lutetium).’
    • ‘Avogadro's number is the number of particles present when the amount of material is the same as the atomic weight (or relative molecular mass, or relative atomic mass or weight) expressed in grams.’
    • ‘Deuterium is a stable isotope of hydrogen with a relative atomic mass of 2.014102 compared to the atomic mass of protium, 1.007825.’


relative atomic mass

/ˈrɛlədɪv əˈtɑmɪk mæs/