- the former name for relative atomic mass
Abbreviation: at wt
WordReference Random House Unabridged Dictionary of American English © 2025
atom′ic weight′, [Chem.]
- Chemistrythe average weight of an atom of an element, formerly based on the weight of one hydrogen atom taken as a unit or on 1⁄16 the weight of an oxygen atom, but after 1961 based on 1⁄12 the weight of the carbon-12 atom. Abbr.: at. wt.
- 1820–30
Collins Concise English Dictionary © HarperCollins Publishers::
'atomic weight' also found in these entries (note: many are not synonyms or translations):
Dumas
- Newlands
- at wt
- at. wt.
- atomic volume
- aw
- carbon
- carbon 12
- combining weight
- equivalent weight
- gram atom
- heavy
- mass number
- radioiron
- reaction
- relative atomic mass
- tellurium
- tritium