| the average weight of a molecule of an element or compound measured in units once based on the weight of one hydrogen atom taken as the standard or on 1/16 the weight of an oxygen atom, but after 1961 based on 1/12 the weight of the carbon-12 atom; the sum of the atomic weights of all the atoms in a molecule. Abbreviation: mol. wt. |
molecular weight n.
Abbr. mol wt, MW
The sum of the atomic weights of all the atoms in a molecule. Also called formula weight.
mol wt abbr.
molecular weight
| molecular weight
The sum of the atomic weights of the atoms contained in a molecule. Also called relative molecular mass. |
