atomic weight
noun1
Natural sciences, Physical sciences, Physics Former term for the more specific relative atomic mass.
- The equivalent weight of an element or compound is that weight equivalent in reactive power to one atomic weight of hydrogen.1922, Leicester F. Hamilton, Calculations of Analytical Chemistry, page 38:
2
Natural sciences, Physical sciences, 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.