formula weight: Meaning and Definition of

for'mula weight"

Pronunciation: [key]
— Chem. Chem.
  1. (of a molecule) See
  2. (of an ionic compound that does not form molecules) the sum of the atomic weights of the atoms of the formula unit.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.