formula weight

noun, Chemistry
1.
(of a molecule) molecular weight.
2.
(of an ionic compound that does not form molecules) the sum of the atomic weights of the atoms of the formula unit.
Examples from the web for formula weight
  • If you will be reporting in molarity or normality, you will need to know the molecular or formula weight of the substance.
formula weight in Medicine

formula weight n.
See molecular weight.