atomic weight (plural atomic weights)

1. (physics) Former term for the more specific relative atomic mass.
   • 1922, Leicester F. Hamilton, Calculations of Analytical Chemistry, page 38:

     The equivalent weight of an element or compound is that weight equivalent in reactive power to one atomic weight of hydrogen.

2. (physics) A term used to represent the mean relative atomic mass of an element in nature, as distinct from the relative atomic mass of a single isotope.

• French: poids atomique
• German: Atomgewicht
• Italian: peso atomico
• Portuguese: peso atómico, peso atômico
• Russian: атомный вес
• Spanish: peso atómico

• French: poids atomique, masse atomique, masse atomique relative
• Russian: атомная масса
• Spanish: peso atómico